22921637 has 4 divisors (see below), whose sum is σ = 22934016. Its totient is φ = 22909260.

The previous prime is 22921631. The next prime is 22921651. The reversal of 22921637 is 73612922.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22921637 - 2²⁴ = 6144421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22921631) by changing a digit.

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, 2789 + ... + 7322.

It is an arithmetic number, because the mean of its divisors is an integer number (5733504).

Almost surely, 2^22921637 is an apocalyptic number.

It is an amenable number.

22921637 is a deficient number, since it is larger than the sum of its proper divisors (12379).

22921637 is a wasteful number, since it uses less digits than its factorization.

22921637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12378.

The product of its digits is 9072, while the sum is 32.

The square root of 22921637 is about 4787.6546450219. The cubic root of 22921637 is about 284.0633537496.

The spelling of 22921637 in words is "twenty-two million, nine hundred twenty-one thousand, six hundred thirty-seven".