Divisor 16384

To determine if any number is divisible by 16384, apply this test:

1. Ignore everything except the 14 right-most digits. Every larger digit than these is irrelevant because 10¹⁴ is divisible by 16384.
2. The number should now be small enough to be able to deduce divisibility by 16384 with basic application of your 16384-times tables!

Easy!