21922684 has 24 divisors (see below), whose sum is σ = 44054528. Its totient is φ = 9350640.

The previous prime is 21922669. The next prime is 21922687. The reversal of 21922684 is 48622912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21922687) 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, 4489 + ... + 7999.

Almost surely, 2^21922684 is an apocalyptic number.

It is an amenable number.

21922684 is an abundant number, since it is smaller than the sum of its proper divisors (22131844).

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

21922684 is a wasteful number, since it uses less digits than its factorization.

21922684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745 (or 3743 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 21922684 is about 4682.1665925082. The cubic root of 21922684 is about 279.8753016165.

The spelling of 21922684 in words is "twenty-one million, nine hundred twenty-two thousand, six hundred eighty-four".