20973424 has 20 divisors (see below), whose sum is σ = 42403536. Its totient is φ = 10030592.

The previous prime is 20973383. The next prime is 20973431. The reversal of 20973424 is 42437902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28129 + ... + 28864.

Almost surely, 2^20973424 is an apocalyptic number.

It is an amenable number.

20973424 is an abundant number, since it is smaller than the sum of its proper divisors (21430112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20973424 is a wasteful number, since it uses less digits than its factorization.

20973424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57024 (or 57018 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 20973424 is about 4579.6750976461. The cubic root of 20973424 is about 275.7759857007.

The spelling of 20973424 in words is "twenty million, nine hundred seventy-three thousand, four hundred twenty-four".