22520764 has 12 divisors (see below), whose sum is σ = 45041584. Its totient is φ = 9651744.

The previous prime is 22520761. The next prime is 22520779. The reversal of 22520764 is 46702522.

22520764 is an admirable number.

It is a super-2 number, since 2×22520764² = 1014369622287392, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) 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 (28), and also a Moran number because the ratio is a prime number: 804313 = 22520764 / (2 + 2 + 5 + 2 + 0 + 7 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22520761) 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, 402129 + ... + 402184.

Almost surely, 2^22520764 is an apocalyptic number.

It is an amenable number.

22520764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22520764 is a wasteful number, since it uses less digits than its factorization.

22520764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804324 (or 804322 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 22520764 is about 4745.6047033018. The cubic root of 22520764 is about 282.3976249509.

The spelling of 22520764 in words is "twenty-two million, five hundred twenty thousand, seven hundred sixty-four".