21922536 has 32 divisors (see below), whose sum is σ = 56145600. Its totient is φ = 7128960.

The previous prime is 21922531. The next prime is 21922559. The reversal of 21922536 is 63522912.

It is not an unprimeable number, because it can be changed into a prime (21922531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10156 + ... + 12123.

It is an arithmetic number, because the mean of its divisors is an integer number (1754550).

Almost surely, 2^21922536 is an apocalyptic number.

It is an amenable number.

21922536 is an abundant number, since it is smaller than the sum of its proper divisors (34223064).

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

21922536 is a wasteful number, since it uses less digits than its factorization.

21922536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22329 (or 22325 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 21922536 is about 4682.1507878324. The cubic root of 21922536 is about 279.8746718025.

The spelling of 21922536 in words is "twenty-one million, nine hundred twenty-two thousand, five hundred thirty-six".