20874972 has 12 divisors (see below), whose sum is σ = 48708296. Its totient is φ = 6958320.

The previous prime is 20874949. The next prime is 20874979. The reversal of 20874972 is 27947802.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20874972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20874979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 869779 + ... + 869802.

Almost surely, 2^20874972 is an apocalyptic number.

It is an amenable number.

20874972 is an abundant number, since it is smaller than the sum of its proper divisors (27833324).

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

20874972 is a wasteful number, since it uses less digits than its factorization.

20874972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739588 (or 1739586 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 20874972 is about 4568.9136564396. The cubic root of 20874972 is about 275.3437992115.

The spelling of 20874972 in words is "twenty million, eight hundred seventy-four thousand, nine hundred seventy-two".