This character is a Nonspacing Mark and is mainly used in the Khmer script.
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+17B4 offers a line break opportunity at its position depending on the further context.
The Wikipedia has the following information about this codepoint:
Khmer is a Unicode block containing characters for writing the Khmer (Cambodian) language. For details of the characters, see Khmer alphabet – Unicode.
Representations
System
Representation (click value to copy)
Nº
6068
UTF-8
E1 9E B4
UTF-16
17 B4
UTF-32
00 00 17 B4
URL-Quoted
%E1%9E%B4
HTML hex reference
឴
Wrong windows-1252 Mojibake
◌឴
Encoding: GB18030 (hex bytes)
81 34 CB 32
RFC 5137
\u'17B4'
Bash and Zsh inside echo -e
\u17B4
C and C++
\u17B4
C#
\u17B4
CSS
\0017B4
Excel
=UNICHAR(6068)
Go
\u17B4
JavaScript
\u17B4
Modern JavaScript since ES6
\u{17b4}
JSON
\u17B4
Java
\u17B4
Lua
\u{17B4}
Matlab
char(6068)
Perl
"\x{17B4}"
PHP
\u{17b4}
PostgreSQL
U&'\17B4'
PowerShell
`u{17B4}
Python
\u17B4
Ruby
\u{17b4}
Rust
\u{17b4}
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