Divisor 20395

To determine if any number is divisible by 20395, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 5 and 4079 - then it is divisible by 20395.

The following tests must pass:

• Test if a number is divisible by 5
• The "Louis Irwin Test" for Divisibility by 4079

Easy!