The bank card number is composed of 16-19 Arabic numerals. Usually debit card numbers have 16 digits, 17 digits and 19 digits, while most credit card numbers have 16 digits; generally 19 digit debit cards and 16 digit credit cards are more common.

Bank card number refers to the number on the bank card. Each bank card has its own bank card number, and the bank card number of each bank card will not be consistent. Anyone who frequently uses bank cards knows that bank cards are composed of 16-19 Arabic numerals without letters. The composition of Arabic numerals also has certain rules.