22021936 has 20 divisors (see below), whose sum is σ = 45177912. Its totient is φ = 10363136.

The previous prime is 22021913. The next prime is 22021943. The reversal of 22021936 is 63912022.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22021936.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40210 + ... + 40753.

Almost surely, 2^22021936 is an apocalyptic number.

It is an amenable number.

22021936 is an abundant number, since it is smaller than the sum of its proper divisors (23155976).

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

22021936 is a wasteful number, since it uses less digits than its factorization.

22021936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80988 (or 80982 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 22021936 is about 4692.7535626751. The cubic root of 22021936 is about 280.2970317279.

Adding to 22021936 its reverse (63912022), we get a palindrome (85933958).

The spelling of 22021936 in words is "twenty-two million, twenty-one thousand, nine hundred thirty-six".