20812974 has 32 divisors (see below), whose sum is σ = 51233280. Its totient is φ = 5488992.

The previous prime is 20812973. The next prime is 20812993. The reversal of 20812974 is 47921802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20812973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18514 + ... + 19605.

It is an arithmetic number, because the mean of its divisors is an integer number (1601040).

Almost surely, 2^20812974 is an apocalyptic number.

20812974 is an abundant number, since it is smaller than the sum of its proper divisors (30420306).

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

20812974 is a wasteful number, since it uses less digits than its factorization.

20812974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38144.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 20812974 is about 4562.1238475079. The cubic root of 20812974 is about 275.0709414773.

The spelling of 20812974 in words is "twenty million, eight hundred twelve thousand, nine hundred seventy-four".