Divisor 20073

To determine if any number is divisible by 20073, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 6691 - then it is divisible by 20073.

The following tests must pass:

• Test if a number is divisible by 3
• The "Ian Glencross Test" for Divisibility by 6691

Easy!