Divisor 20623

To determine if any number is divisible by 20623, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 41 and 503 - then it is divisible by 20623.

The following tests must pass:

• Test if a number is divisible by 41
• Test if a number is divisible by 503

Easy!