U+0004, 
<control-0004>
(Abbreviation: EOT)
[unassigned: U+0000–U+0003][unassigned: U+0005–U+001F]
Basic Latin
[U+0020]
Presentations of 4︎
Text
style
Emoji
style
4︎ 4️
Note: Character's appearance
may be different on each system.
Text style is forced with &#xFE0E;
and emoji style with &#xFE0F;

Emoji