21952422 has 24 divisors (see below), whose sum is σ = 47688264. Its totient is φ = 7298304.

The previous prime is 21952387. The next prime is 21952459. The reversal of 21952422 is 22425912.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6598 + ... + 9350.

It is an arithmetic number, because the mean of its divisors is an integer number (1987011).

Almost surely, 2^21952422 is an apocalyptic number.

21952422 is an abundant number, since it is smaller than the sum of its proper divisors (25735842).

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

21952422 is a wasteful number, since it uses less digits than its factorization.

21952422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204 (or 3201 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 21952422 is about 4685.3411828809. The cubic root of 21952422 is about 280.0017942062.

The spelling of 21952422 in words is "twenty-one million, nine hundred fifty-two thousand, four hundred twenty-two".