This property defines the Unicodes which are Other Numbers
Characters like ²,³,¹, etc. are listed under Other Number General Category.
915 Characters are present in Other Number General Category starting with the Unicode point U+00B2 that represents the character ².
Currently, as per latest version 15.0.0, Unicode supports 30 number of General Category. Here are a few examples - Close Punctuation,Connector Punctuation,Control Character, etc.