Divisor 21664

To determine if any number is divisible by 21664, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 32 and 677 - then it is divisible by 21664.

The following tests must pass:

• Test if a number is divisible by 32
• Test if a number is divisible by 677

Easy!