This character is a Other Symbol and is commonly used, that is, in no specific 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+2384 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
A compose key (sometimes called multi key) is a key on a computer keyboard that indicates that the following (usually 2 or more) keystrokes trigger the insertion of an alternate character, typically a precomposed character or a symbol.
For instance, typing Compose followed by ~ and then n will insert ñ.
Compose keys are most popular on Linux and other systems using the X Window System, but software exists to implement them on Windows and macOS.
Representations
System
Representation (click value to copy)
Nº
9092
UTF-8
E2 8E 84
UTF-16
23 84
UTF-32
00 00 23 84
URL-Quoted
%E2%8E%84
HTML hex reference
⎄
Wrong windows-1252 Mojibake
⎄
Encoding: GB18030 (hex bytes)
81 36 F4 36
RFC 5137
\u'2384'
Bash and Zsh inside echo -e
\u2384
C and C++
\u2384
C#
\u2384
CSS
\002384
Excel
=UNICHAR(9092)
Go
\u2384
JavaScript
\u2384
Modern JavaScript since ES6
\u{2384}
JSON
\u2384
Java
\u2384
Lua
\u{2384}
Matlab
char(9092)
Perl
"\x{2384}"
PHP
\u{2384}
PostgreSQL
U&'\2384'
PowerShell
`u{2384}
Python
\u2384
Ruby
\u{2384}
Rust
\u{2384}
Click the star button next to each label to set this representation as favorite or remove it from the favorites. Favorites will be shown initially. (Favorites are stored locally on your computer and never sent over the internet.)