Code point
U+2A1C
Glyph appearance depends on your fonts.
U+2A1C
SmU+2A1C INTEGRAL WITH UNDERBAR is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Supplemental Mathematical Operators block.
Choose the representation you need, then copy its value.
U+2A1C
10780
⨜
⨜
E2 A8 9C
2A1C
00002A1C
%E2%A8%9C
\u2A1C
\u2A1C
\u2A1C
\2A1C