This property defines the Unicodes which have numeric value as 13
Characters like ⑬,⒀,⒔, etc. are listed under 13 Numeric Value.
7 Characters are present in 13 Numeric Value starting with the Unicode point U+246C that represents the character ⑬.
Currently, as per latest version 15.0.0, Unicode supports 150 number of Numeric Value. Here are a few examples - 0,1,1/10, etc.