This character is a Other Symbol and is mainly used in the Greek script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+10184 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
Ancient Greek Numbers is a Unicode block containing acrophonic numerals used in ancient Greece, including ligatures and special symbols.
Representations
System
Representation (click value to copy)
NΒΊ
65924
UTF-8
F0 90 86 84
UTF-16
D8 00 DD 84
UTF-32
00 01 01 84
URL-Quoted
%F0%90%86%84
HTML hex reference
𐆄
Wrong windows-1252 Mojibake
Γ°Ββ β
Encoding: GB18030 (hex bytes)
90 30 A7 38
RFC 5137
\u'10184'
Bash and Zsh inside echo -e
\U00010184
C and C++
\U00010184
C#
\U00010184
CSS
\010184
Excel
=UNICHAR(65924)
Go
\U00010184
JavaScript
\uD800\uDD84
Modern JavaScript since ES6
\u{10184}
JSON
\uD800\uDD84
Java
\uD800\uDD84
Lua
\u{10184}
Matlab
char(65924)
Perl
"\x{10184}"
PHP
\u{10184}
PostgreSQL
U&'\+010184'
PowerShell
`u{10184}
Python
\U00010184
Ruby
\u{10184}
Rust
\u{10184}
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