Source: Noto Sans Math

U+20E7 Combining Annuity Symbol

U+20E7 was added in Unicode version 3.2 in 2002. It belongs to the block U+20D0 to U+20FF Combining Diacritical Marks for Symbols in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Nonspacing Mark and inherits its script property from the preceding character. The character is also known as actuarial bend.

The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Nonspacing Mark. When changing direction it is not mirrored. U+20E7 prohibits a line break before it.

The Wikipedia has the following information about this codepoint:

Actuarial notation is a shorthand method to allow actuaries to record mathematical formulas that deal with interest rates and life tables.
Traditional notation uses a halo system, where symbols are placed as superscript or subscript before or after the main letter. Example notation using the halo system can be seen below.
Various proposals have been made to adopt a linear system, where all the notation would be on a single line without the use of superscripts or subscripts. Such a method would be useful for computing where representation of the halo system can be extremely difficult. However, a standard linear system has yet to emerge.

Representations

System	Representation (click value to copy)
Nº	8423
UTF-8	E2 83 A7
UTF-16	20 E7
UTF-32	00 00 20 E7
URL-Quoted	%E2%83%A7
HTML hex reference	⃧
Wrong windows-1252 Mojibake	â—Œâƒ§
alias	actuarial bend
Encoding: GB18030 (hex bytes)	81 36 B9 30
RFC 5137	\u'20E7'
Bash and Zsh inside `echo -e`	\u20E7
C and C++	\u20E7
C#	\u20E7
CSS	\0020E7
Excel	=UNICHAR(8423)
Go	\u20E7
JavaScript	\u20E7
Modern JavaScript since ES6	\u{20e7}
JSON	\u20E7
Java	\u20E7
Lua	\u{20E7}
Matlab	char(8423)
Perl	"\x{20E7}"
PHP	\u{20e7}
PostgreSQL	U&'\20E7'
PowerShell	`u{20E7}
Python	\u20E7
Ruby	\u{20e7}
Rust	\u{20e7}
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Elsewhere

Complete Record

Property	Value
Age (age)	3.2 (2002)
Unicode Name (na)	COMBINING ANNUITY SYMBOL
Unicode 1 Name (na1)	—
Block (blk)	Combining Diacritical Marks for Symbols
General Category (gc)	Nonspacing Mark
Script (sc)	Inherited
Bidirectional Category (bc)	Nonspacing Mark
Combining Class (ccc)	Above
Decomposition Type (dt)	none
Decomposition Mapping (dm)	Combining Annuity Symbol
Lowercase (Lower)	✘
Simple Lowercase Mapping (slc)	Combining Annuity Symbol
Lowercase Mapping (lc)	Combining Annuity Symbol
Uppercase (Upper)	✘
Simple Uppercase Mapping (suc)	Combining Annuity Symbol
Uppercase Mapping (uc)	Combining Annuity Symbol
Simple Titlecase Mapping (stc)	Combining Annuity Symbol
Titlecase Mapping (tc)	Combining Annuity Symbol
Case Folding (cf)	Combining Annuity Symbol
ASCII Hex Digit (AHex)	✘
Alphabetic (Alpha)	✘
Bidi Control (Bidi_C)	✘
Bidi Mirrored (Bidi_M)	✘
Composition Exclusion (CE)	✘
Case Ignorable (CI)	✔
Changes When Casefolded (CWCF)	✘
Changes When Casemapped (CWCM)	✘
Changes When NFKC Casefolded (CWKCF)	✘
Changes When Lowercased (CWL)	✘
Changes When Titlecased (CWT)	✘
Changes When Uppercased (CWU)	✘
Cased (Cased)	✘
Full Composition Exclusion (Comp_Ex)	✘
Default Ignorable Code Point (DI)	✘
Dash (Dash)	✘
Deprecated (Dep)	✘
Diacritic (Dia)	✘
Emoji Modifier Base (EBase)	✘
Emoji Component (EComp)	✘
Emoji Modifier (EMod)	✘
Emoji Presentation (EPres)	✘
Emoji (Emoji)	✘
Extender (Ext)	✘
Extended Pictographic (ExtPict)	✘
FC NFKC Closure (FC_NFKC)	Combining Annuity Symbol
Grapheme Cluster Break (GCB)	Extend
Grapheme Base (Gr_Base)	✘
Grapheme Extend (Gr_Ext)	✔
Grapheme Link (Gr_Link)	✘
Hex Digit (Hex)	✘
Hyphen (Hyphen)	✘
ID Continue (IDC)	✔
ID Start (IDS)	✘
IDS Binary Operator (IDSB)	✘
IDS Trinary Operator and (IDST)	✘
IDSU (IDSU)	0
ID_Compat_Math_Continue (ID_Compat_Math_Continue)	0
ID_Compat_Math_Start (ID_Compat_Math_Start)	0
Ideographic (Ideo)	✘
InCB (InCB)	Extend
Indic Mantra Category (InMC)	—
Indic Positional Category (InPC)	NA
Indic Syllabic Category (InSC)	Other
Jamo Short Name (JSN)	—
Join Control (Join_C)	✘
Logical Order Exception (LOE)	✘
Modifier Combining Mark (MCM)	✘
Math (Math)	✘
Noncharacter Code Point (NChar)	✘
NFC Quick Check (NFC_QC)	Yes
NFD Quick Check (NFD_QC)	Yes
NFKC Casefold (NFKC_CF)	Combining Annuity Symbol
NFKC Quick Check (NFKC_QC)	Yes
NFKC_SCF (NFKC_SCF)	Combining Annuity Symbol
NFKD Quick Check (NFKD_QC)	Yes
Other Alphabetic (OAlpha)	✘
Other Default Ignorable Code Point (ODI)	✘
Other Grapheme Extend (OGr_Ext)	✘
Other ID Continue (OIDC)	✘
Other ID Start (OIDS)	✘
Other Lowercase (OLower)	✘
Other Math (OMath)	✘
Other Uppercase (OUpper)	✘
Prepended Concatenation Mark (PCM)	✘
Pattern Syntax (Pat_Syn)	✘
Pattern White Space (Pat_WS)	✘
Quotation Mark (QMark)	✘
Regional Indicator (RI)	✘
Radical (Radical)	✘
Sentence Break (SB)	Extend
Soft Dotted (SD)	✘
Sentence Terminal (STerm)	✘
Terminal Punctuation (Term)	✘
Unified Ideograph (UIdeo)	✘
Variation Selector (VS)	✘
Word Break (WB)	Extend
White Space (WSpace)	✘
XID Continue (XIDC)	✔
XID Start (XIDS)	✘
Expands On NFC (XO_NFC)	✘
Expands On NFD (XO_NFD)	✘
Expands On NFKC (XO_NFKC)	✘
Expands On NFKD (XO_NFKD)	✘
Bidi Paired Bracket (bpb)	Combining Annuity Symbol
Bidi Paired Bracket Type (bpt)	None
East Asian Width (ea)	neutral
Hangul Syllable Type (hst)	Not Applicable
ISO 10646 Comment (isc)	—
Joining Group (jg)	No_Joining_Group
Joining Type (jt)	Transparent
Line Break (lb)	Combining Mark
Numeric Type (nt)	none
Numeric Value (nv)	not a number
Simple Case Folding (scf)	Combining Annuity Symbol
Script Extension (scx)
Vertical Orientation (vo)	R