22921664 has 28 divisors (see below), whose sum is σ = 45637704. Its totient is φ = 11422464.

The previous prime is 22921663. The next prime is 22921667. The reversal of 22921664 is 46612922.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 22921664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22921663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35327 + ... + 35969.

It is an arithmetic number, because the mean of its divisors is an integer number (1629918).

Almost surely, 2^22921664 is an apocalyptic number.

It is an amenable number.

22921664 is a deficient number, since it is larger than the sum of its proper divisors (22716040).

22921664 is an equidigital number, since it uses as much as digits as its factorization.

22921664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212 (or 1202 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 22921664 is about 4787.6574647734. The cubic root of 22921664 is about 284.0634652848.

The spelling of 22921664 in words is "twenty-two million, nine hundred twenty-one thousand, six hundred sixty-four".