22002564 has 24 divisors (see below), whose sum is σ = 51476320. Its totient is φ = 7314624.

The previous prime is 22002557. The next prime is 22002583. The reversal of 22002564 is 46520022.

It is a super-2 number, since 2×22002564² = 968225645148192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22002564.

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, 2667 + ... + 7149.

Almost surely, 2^22002564 is an apocalyptic number.

It is an amenable number.

22002564 is an abundant number, since it is smaller than the sum of its proper divisors (29473756).

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

22002564 is a wasteful number, since it uses less digits than its factorization.

22002564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4899 (or 4897 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 22002564 is about 4690.6890751786. The cubic root of 22002564 is about 280.2148181409.

Adding to 22002564 its reverse (46520022), we get a palindrome (68522586).

The spelling of 22002564 in words is "twenty-two million, two thousand, five hundred sixty-four".