Divisor 21623

To determine if any number is divisible by 21623, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 7 and 3089 - then it is divisible by 21623.

The following tests must pass:

• Test if a number is divisible by 7
• The "Brad Test" for Divisibility by 3089

Easy!