Divisor 21776

To determine if any number is divisible by 21776, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 16 and 1361 - then it is divisible by 21776.

The following tests must pass:

• Test if a number is divisible by 16
• The "Liam Edgeley Test" for Divisibility by 1361

Easy!