Divisor 19443

To determine if any number is divisible by 19443, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 6481 - then it is divisible by 19443.

The following tests must pass:

• Test if a number is divisible by 3
• The "Robert Wrigley Test" for Divisibility by 6481

Easy!