Divisor 19858

To determine if any number is divisible by 19858, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 2 and 9929 - then it is divisible by 19858.

The following tests must pass:

• Test if a number is divisible by 2
• The "Benedikt Gurdon Test" for Divisibility by 9929

Easy!