22021908 has 24 divisors (see below), whose sum is σ = 51673440. Its totient is φ = 7299360.

The previous prime is 22021903. The next prime is 22021913. The reversal of 22021908 is 80912022.

It is an interprime number because it is at equal distance from previous prime (22021903) and next prime (22021913).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2898 + ... + 7241.

It is an arithmetic number, because the mean of its divisors is an integer number (2153060).

Almost surely, 2^22021908 is an apocalyptic number.

It is an amenable number.

22021908 is an abundant number, since it is smaller than the sum of its proper divisors (29651532).

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

22021908 is a wasteful number, since it uses less digits than its factorization.

22021908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10327 (or 10325 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 22021908 is about 4692.7505793511. The cubic root of 22021908 is about 280.2969129324.

The spelling of 22021908 in words is "twenty-two million, twenty-one thousand, nine hundred eight".