21922476 has 12 divisors (see below), whose sum is σ = 51152472. Its totient is φ = 7307488.

The previous prime is 21922429. The next prime is 21922501. The reversal of 21922476 is 67422912.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 913425 + ... + 913448.

It is an arithmetic number, because the mean of its divisors is an integer number (4262706).

Almost surely, 2^21922476 is an apocalyptic number.

It is an amenable number.

21922476 is an abundant number, since it is smaller than the sum of its proper divisors (29229996).

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

21922476 is a wasteful number, since it uses less digits than its factorization.

21922476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826880 (or 1826878 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 21922476 is about 4682.1443805163. The cubic root of 21922476 is about 279.8744164717.

The spelling of 21922476 in words is "twenty-one million, nine hundred twenty-two thousand, four hundred seventy-six".