Divisor 18999

To determine if any number is divisible by 18999, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 9 and 2111 - then it is divisible by 18999.

The following tests must pass:

• Test if a number is divisible by 9
• The "Brittany Pollock Test" for Divisibility by 2111

Easy!