21456022 has 16 divisors (see below), whose sum is σ = 37533600. Its totient is φ = 9195144.

The previous prime is 21456007. The next prime is 21456047. The reversal of 21456022 is 22065412.

It is a junction number, because it is equal to n+sod(n) for n = 21455984 and 21456002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14953 + ... + 16324.

It is an arithmetic number, because the mean of its divisors is an integer number (2345850).

Almost surely, 2^21456022 is an apocalyptic number.

21456022 is a deficient number, since it is larger than the sum of its proper divisors (16077578).

21456022 is an equidigital number, since it uses as much as digits as its factorization.

21456022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31300 (or 31286 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 21456022 is about 4632.0645505001. The cubic root of 21456022 is about 277.8751660771.

The spelling of 21456022 in words is "twenty-one million, four hundred fifty-six thousand, twenty-two".