使用regex从字符串中提取ICCID

I'm trying to return and print the ICCID of a SIM card in a device; the SIM cards are from various suppliers and therefore of differing lengths (either 19 or 20 digits). As a result, I'm looking for a regular expression that will extract the ICCID (in a way that's agnostic to non-word characters immediately surrounding it).I'm trying to return and print the ICCID of a S