This character is a Decimal Number and is mainly used in the Khmer 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+17E4 forms a number 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
6116
UTF-8
E1 9F A4
UTF-16
17 E4
UTF-32
00 00 17 E4
URL-Quoted
%E1%9F%A4
HTML hex reference
៤
Wrong windows-1252 Mojibake
៤
Encoding: GB18030 (hex bytes)
81 34 D0 30
RFC 5137
\u'17E4'
Bash and Zsh inside echo -e
\u17E4
C and C++
\u17E4
C#
\u17E4
CSS
\0017E4
Excel
=UNICHAR(6116)
Go
\u17E4
JavaScript
\u17E4
Modern JavaScript since ES6
\u{17e4}
JSON
\u17E4
Java
\u17E4
Lua
\u{17E4}
Matlab
char(6116)
Perl
"\x{17E4}"
PHP
\u{17e4}
PostgreSQL
U&'\17E4'
PowerShell
`u{17E4}
Python
\u17E4
Ruby
\u{17e4}
Rust
\u{17e4}
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