PARENTHESIZED NUMBER EIGHTEEN is one of the 160 characters in the Enclosed Alphanumerics Unicode subset.
The image below shows how the PARENTHESIZED NUMBER EIGHTEEN symbol looks like in some of the most complete UTF-8 fonts: Code2000, Sun-ExtA, WenQuanYi Zen Hei and GNU Unifont. If the font in which this web site is displayed does not contain the PARENTHESIZED NUMBER EIGHTEEN symbol, you can use the image below to get an idea of what it should look like.
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