22513664 has 24 divisors (see below), whose sum is σ = 45020430. Its totient is φ = 11255808.

The previous prime is 22513663. The next prime is 22513669. The reversal of 22513664 is 46631522.

It can be written as a sum of positive squares in only one way, i.e., 21529600 + 984064 = 4640^2 + 992^2 .

It is not an unprimeable number, because it can be changed into a prime (22513663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3449 + ... + 7544.

Almost surely, 2^22513664 is an apocalyptic number.

It is an amenable number.

22513664 is a deficient number, since it is larger than the sum of its proper divisors (22506766).

22513664 is an equidigital number, since it uses as much as digits as its factorization.

22513664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11015 (or 10995 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 22513664 is about 4744.8565837125. The cubic root of 22513664 is about 282.3679451722.

The spelling of 22513664 in words is "twenty-two million, five hundred thirteen thousand, six hundred sixty-four".