Divisor 18021

To determine if any number is divisible by 18021, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 6007 - then it is divisible by 18021.

The following tests must pass:

• Test if a number is divisible by 3
• The "chuck zegar Test" for Divisibility by 6007

Easy!