Divisor 20872

To determine if any number is divisible by 20872, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 8 and 2609 - then it is divisible by 20872.

The following tests must pass:

• Test if a number is divisible by 8
• The "Noah Whiteman Test" for Divisibility by 2609

Easy!