20973968 has 40 divisors (see below), whose sum is σ = 42408000. Its totient is φ = 10039680.

The previous prime is 20973959. The next prime is 20973977. The reversal of 20973968 is 86937902.

It is an interprime number because it is at equal distance from previous prime (20973959) and next prime (20973977).

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, 41783 + ... + 42281.

It is an arithmetic number, because the mean of its divisors is an integer number (1060200).

Almost surely, 2^20973968 is an apocalyptic number.

It is an amenable number.

20973968 is an abundant number, since it is smaller than the sum of its proper divisors (21434032).

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

20973968 is a wasteful number, since it uses less digits than its factorization.

20973968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 20973968 is about 4579.7344901206. The cubic root of 20973968 is about 275.7783700012.

The spelling of 20973968 in words is "twenty million, nine hundred seventy-three thousand, nine hundred sixty-eight".