This character is a Decimal Number and is mainly used in the Javanese script. The codepoint has the decimal value 4.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from left to right. When changing direction it is not mirrored. This number joins with other adjacent letters and numbers to form a word. U+A9D4 forms an orthographic syllable in Brahmic scripts with similar characters, which prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
4 (four) is a number, numeral and digit. It is the natural number following 3 and preceding 5. It is a square number, the smallest semiprime and composite number, and is considered unlucky in many East Asian cultures.
Representations
System
Representation (click value to copy)
Nº
43476
UTF-8
EA A7 94
UTF-16
A9 D4
UTF-32
00 00 A9 D4
URL-Quoted
%EA%A7%94
HTML hex reference
꧔
Wrong windows-1252 Mojibake
꧔
Encoding: GB18030 (hex bytes)
82 37 97 39
RFC 5137
\u'A9D4'
Bash and Zsh inside echo -e
\uA9D4
C and C++
\uA9D4
C#
\uA9D4
CSS
\00A9D4
Excel
=UNICHAR(43476)
Go
\uA9D4
JavaScript
\uA9D4
Modern JavaScript since ES6
\u{a9d4}
JSON
\uA9D4
Java
\uA9D4
Lua
\u{A9D4}
Matlab
char(43476)
Perl
"\x{A9D4}"
PHP
\u{a9d4}
PostgreSQL
U&'\A9D4'
PowerShell
`u{A9D4}
Python
\uA9D4
Ruby
\u{a9d4}
Rust
\u{a9d4}
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