This character is a Other Number and is commonly used, that is, in no specific script. The codepoint represents the digit0.
The glyph is a circle version of the glyph Digit Zero. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. If its East Asian Width is “narrow”, U+24EA forms a word with similar characters, which prevents a line break inside it. Otherwise it allows line breaks around it, except in some numeric contexts. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
Enclosed Alphanumerics is a Unicode block of typographical symbols of an alphanumeric within a circle, a bracket or other not-closed enclosure, or ending in a full stop.
It is currently fully allocated. Within the Basic Multilingual Plane, a few additional enclosed numerals are in the Dingbats and the Enclosed CJK Letters and Months blocks. There is also a block with more of these characters in the Supplementary Multilingual Plane named Enclosed Alphanumeric Supplement (U+1F100–U+1F1FF), as of Unicode 6.0.
Representations
System
Representation (click value to copy)
Nº
9450
UTF-8
E2 93 AA
UTF-16
24 EA
UTF-32
00 00 24 EA
URL-Quoted
%E2%93%AA
HTML hex reference
⓪
Wrong windows-1252 Mojibake
⓪
Encoding: GB18030 (hex bytes)
81 37 95 34
digraph
0-o
RFC 5137
\u'24EA'
Bash and Zsh inside echo -e
\u24EA
C and C++
\u24EA
C#
\u24EA
CSS
\0024EA
Excel
=UNICHAR(9450)
Go
\u24EA
JavaScript
\u24EA
Modern JavaScript since ES6
\u{24ea}
JSON
\u24EA
Java
\u24EA
Lua
\u{24EA}
Matlab
char(9450)
Perl
"\x{24EA}"
PHP
\u{24ea}
PostgreSQL
U&'\24EA'
PowerShell
`u{24EA}
Python
\u24EA
Ruby
\u{24ea}
Rust
\u{24ea}
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