21804022456 has 16 divisors (see below), whose sum is σ = 40925455200. Its totient is φ = 10890567744.

The previous prime is 21804022421. The next prime is 21804022483. The reversal of 21804022456 is 65422040812.

It is a congruent number.

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, 1422336 + ... + 1437583.

It is an arithmetic number, because the mean of its divisors is an integer number (2557840950).

Almost surely, 2^21804022456 is an apocalyptic number.

It is an amenable number.

21804022456 is a deficient number, since it is larger than the sum of its proper divisors (19121432744).

21804022456 is a wasteful number, since it uses less digits than its factorization.

21804022456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860878 (or 2860874 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The spelling of 21804022456 in words is "twenty-one billion, eight hundred four million, twenty-two thousand, four hundred fifty-six".