22712004 has 36 divisors (see below), whose sum is σ = 65613184. Its totient is φ = 6489072.

The previous prime is 22711981. The next prime is 22712021. The reversal of 22712004 is 40021722.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44812 + ... + 45315.

Almost surely, 2^22712004 is an apocalyptic number.

It is an amenable number.

22712004 is an abundant number, since it is smaller than the sum of its proper divisors (42901180).

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

22712004 is a wasteful number, since it uses less digits than its factorization.

22712004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90144 (or 90139 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 22712004 is about 4765.7112795468. The cubic root of 22712004 is about 283.1947200490.

Adding to 22712004 its reverse (40021722), we get a palindrome (62733726).

The spelling of 22712004 in words is "twenty-two million, seven hundred twelve thousand, four".