Divisor 20373

To determine if any number is divisible by 20373, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 6791 - then it is divisible by 20373.

The following tests must pass:

• Test if a number is divisible by 3
• The "Nicholas DiTrolio Test" for Divisibility by 6791

Easy!