Divisor 19967

To determine if any number is divisible by 19967, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 41 and 487 - then it is divisible by 19967.

The following tests must pass:

• Test if a number is divisible by 41
• Test if a number is divisible by 487

Easy!