22204664 has 8 divisors (see below), whose sum is σ = 41633760. Its totient is φ = 11102328.

The previous prime is 22204661. The next prime is 22204681. The reversal of 22204664 is 46640222.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22204661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1387784 + ... + 1387799.

It is an arithmetic number, because the mean of its divisors is an integer number (5204220).

Almost surely, 2^22204664 is an apocalyptic number.

It is an amenable number.

22204664 is a deficient number, since it is larger than the sum of its proper divisors (19429096).

22204664 is a wasteful number, since it uses less digits than its factorization.

22204664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775589 (or 2775585 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 22204664 is about 4712.1825091989. The cubic root of 22204664 is about 281.0701563661.

Adding to 22204664 its reverse (46640222), we get a palindrome (68844886).

The spelling of 22204664 in words is "twenty-two million, two hundred four thousand, six hundred sixty-four".