20973902 has 16 divisors (see below), whose sum is σ = 33164640. Its totient is φ = 9932832.

The previous prime is 20973893. The next prime is 20973913. The reversal of 20973902 is 20937902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338 + ... + 6485.

It is an arithmetic number, because the mean of its divisors is an integer number (2072790).

Almost surely, 2^20973902 is an apocalyptic number.

20973902 is a deficient number, since it is larger than the sum of its proper divisors (12190738).

20973902 is a wasteful number, since it uses less digits than its factorization.

20973902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6907.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 20973902 is about 4579.7272844570. The cubic root of 20973902 is about 275.7780807317.

The spelling of 20973902 in words is "twenty million, nine hundred seventy-three thousand, nine hundred two".