Divisor 20687

To determine if any number is divisible by 20687, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 137 and 151 - then it is divisible by 20687.

The following tests must pass:

• Test if a number is divisible by 137
• Test if a number is divisible by 151

Easy!