Divisor 20404

To determine if any number is divisible by 20404, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 4 and 5101 - then it is divisible by 20404.

The following tests must pass:

• Test if a number is divisible by 4
• The "IS4 Test" for Divisibility by 5101

Easy!