Divisor 18609

To determine if any number is divisible by 18609, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 6203 - then it is divisible by 18609.

The following tests must pass:

• Test if a number is divisible by 3
• The "Shell Stewart Test" for Divisibility by 6203

Easy!