20864472 has 32 divisors (see below), whose sum is σ = 52282800. Its totient is φ = 6938624.

The previous prime is 20864429. The next prime is 20864477. The reversal of 20864472 is 27446802.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20864477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14104 + ... + 15512.

Almost surely, 2^20864472 is an apocalyptic number.

It is an amenable number.

20864472 is an abundant number, since it is smaller than the sum of its proper divisors (31418328).

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

20864472 is a wasteful number, since it uses less digits than its factorization.

20864472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035 (or 2031 counting only the distinct ones).

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

The square root of 20864472 is about 4567.7644422628. The cubic root of 20864472 is about 275.2976259796.

The spelling of 20864472 in words is "twenty million, eight hundred sixty-four thousand, four hundred seventy-two".