20943536 has 20 divisors (see below), whose sum is σ = 40669272. Its totient is φ = 10448256.

The previous prime is 20943511. The next prime is 20943551. The reversal of 20943536 is 63534902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7556 + ... + 9948.

Almost surely, 2^20943536 is an apocalyptic number.

It is an amenable number.

20943536 is a deficient number, since it is larger than the sum of its proper divisors (19725736).

20943536 is a wasteful number, since it uses less digits than its factorization.

20943536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2948 (or 2942 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 20943536 is about 4576.4108207197. The cubic root of 20943536 is about 275.6449260159.

The spelling of 20943536 in words is "twenty million, nine hundred forty-three thousand, five hundred thirty-six".