22081204 has 12 divisors (see below), whose sum is σ = 38902500. Its totient is φ = 10966208.

The previous prime is 22081187. The next prime is 22081253. The reversal of 22081204 is 40218022.

It can be written as a sum of positive squares in 2 ways, for example, as 2896804 + 19184400 = 1702^2 + 4380^2 .

It is a congruent number.

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, 17929 + ... + 19120.

It is an arithmetic number, because the mean of its divisors is an integer number (3241875).

Almost surely, 2^22081204 is an apocalyptic number.

It is an amenable number.

22081204 is a deficient number, since it is larger than the sum of its proper divisors (16821296).

22081204 is a wasteful number, since it uses less digits than its factorization.

22081204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37202 (or 37200 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 22081204 is about 4699.0641621497. The cubic root of 22081204 is about 280.5482624920.

Adding to 22081204 its reverse (40218022), we get a palindrome (62299226).

The spelling of 22081204 in words is "twenty-two million, eighty-one thousand, two hundred four".