21422368 has 24 divisors (see below), whose sum is σ = 46010160. Its totient is φ = 9737280.

The previous prime is 21422347. The next prime is 21422381. The reversal of 21422368 is 86322412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30078 + ... + 30781.

It is an arithmetic number, because the mean of its divisors is an integer number (1917090).

Almost surely, 2^21422368 is an apocalyptic number.

It is an amenable number.

21422368 is an abundant number, since it is smaller than the sum of its proper divisors (24587792).

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

21422368 is a wasteful number, since it uses less digits than its factorization.

21422368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60880 (or 60872 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 21422368 is about 4628.4304034953. The cubic root of 21422368 is about 277.7298066612.

The spelling of 21422368 in words is "twenty-one million, four hundred twenty-two thousand, three hundred sixty-eight".