22921836 has 24 divisors (see below), whose sum is σ = 61125120. Its totient is φ = 6549072.

The previous prime is 22921817. The next prime is 22921837. The reversal of 22921836 is 63812922.

It is a happy number.

It is a super-2 number, since 2×22921836² = 1050821131221792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22921797 and 22921806.

It is not an unprimeable number, because it can be changed into a prime (22921837) 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 7 ways as a sum of consecutive naturals, for example, 136356 + ... + 136523.

It is an arithmetic number, because the mean of its divisors is an integer number (2546880).

Almost surely, 2^22921836 is an apocalyptic number.

It is an amenable number.

22921836 is an abundant number, since it is smaller than the sum of its proper divisors (38203284).

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

22921836 is a wasteful number, since it uses less digits than its factorization.

22921836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272893 (or 272891 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 22921836 is about 4787.6754275953. The cubic root of 22921836 is about 284.0641758032.

The spelling of 22921836 in words is "twenty-two million, nine hundred twenty-one thousand, eight hundred thirty-six".