Divisor 19655

To determine if any number is divisible by 19655, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 5 and 3931 - then it is divisible by 19655.

The following tests must pass:

• Test if a number is divisible by 5
• The "Christ van Willegen Test" for Divisibility by 3931

Easy!