Divisor 21968

To determine if any number is divisible by 21968, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 16 and 1373 - then it is divisible by 21968.

The following tests must pass:

• Test if a number is divisible by 16
• The "Bennet Becker Test" for Divisibility by 1373

Easy!