21902322 has 32 divisors (see below), whose sum is σ = 47420352. Its totient is φ = 6704064.

The previous prime is 21902317. The next prime is 21902333. The reversal of 21902322 is 22320912.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17088 + ... + 18324.

It is an arithmetic number, because the mean of its divisors is an integer number (1481886).

Almost surely, 2^21902322 is an apocalyptic number.

21902322 is an abundant number, since it is smaller than the sum of its proper divisors (25518030).

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

21902322 is a wasteful number, since it uses less digits than its factorization.

21902322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 21902322 is about 4679.9916666592. The cubic root of 21902322 is about 279.7886244837.

The spelling of 21902322 in words is "twenty-one million, nine hundred two thousand, three hundred twenty-two".