20464872 has 32 divisors (see below), whose sum is σ = 54172800. Its totient is φ = 6420224.

The previous prime is 20464849. The next prime is 20464883. The reversal of 20464872 is 27846402.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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, 24672 + ... + 25487.

It is an arithmetic number, because the mean of its divisors is an integer number (1692900).

Almost surely, 2^20464872 is an apocalyptic number.

It is an amenable number.

20464872 is an abundant number, since it is smaller than the sum of its proper divisors (33707928).

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

20464872 is a wasteful number, since it uses less digits than its factorization.

20464872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50185 (or 50181 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 20464872 is about 4523.8116671674. The cubic root of 20464872 is about 273.5287689470.

The spelling of 20464872 in words is "twenty million, four hundred sixty-four thousand, eight hundred seventy-two".