Divisor 18707

To determine if any number is divisible by 18707, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 13 and 1439 - then it is divisible by 18707.

The following tests must pass:

• Test if a number is divisible by 13
• The "Daelf Derechef Test" for Divisibility by 1439

Easy!