22643204 has 6 divisors (see below), whose sum is σ = 39625614. Its totient is φ = 11321600.

The previous prime is 22643189. The next prime is 22643209. The reversal of 22643204 is 40234622.

It can be written as a sum of positive squares in only one way, i.e., 12390400 + 10252804 = 3520^2 + 3202^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22643204.

It is not an unprimeable number, because it can be changed into a prime (22643209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830397 + ... + 2830404.

It is an arithmetic number, because the mean of its divisors is an integer number (6604269).

Almost surely, 2^22643204 is an apocalyptic number.

It is an amenable number.

22643204 is a deficient number, since it is larger than the sum of its proper divisors (16982410).

22643204 is a wasteful number, since it uses less digits than its factorization.

22643204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5660805 (or 5660803 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 22643204 is about 4758.4875748498. The cubic root of 22643204 is about 282.9084763578.

Adding to 22643204 its reverse (40234622), we get a palindrome (62877826).

The spelling of 22643204 in words is "twenty-two million, six hundred forty-three thousand, two hundred four".