22731204 has 12 divisors (see below), whose sum is σ = 53039504. Its totient is φ = 7577064.

The previous prime is 22731167. The next prime is 22731211. The reversal of 22731204 is 40213722.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947122 + ... + 947145.

Almost surely, 2^22731204 is an apocalyptic number.

It is an amenable number.

22731204 is an abundant number, since it is smaller than the sum of its proper divisors (30308300).

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

22731204 is a wasteful number, since it uses less digits than its factorization.

22731204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894274 (or 1894272 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 22731204 is about 4767.7252437614. The cubic root of 22731204 is about 283.2744988180.

Adding to 22731204 its reverse (40213722), we get a palindrome (62944926).

The spelling of 22731204 in words is "twenty-two million, seven hundred thirty-one thousand, two hundred four".