Divisor 20729

To determine if any number is divisible by 20729, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 19 and 1091 - then it is divisible by 20729.

The following tests must pass:

• Test if a number is divisible by 19
• The "Richy_s Test" for Divisibility by 1091

Easy!