21827335904 has 24 divisors (see below), whose sum is σ = 46879165368. Its totient is φ = 9921516160.

The previous prime is 21827335891. The next prime is 21827335921. The reversal of 21827335904 is 40953372812.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 31004387 + ... + 31005090.

It is an arithmetic number, because the mean of its divisors is an integer number (1953298557).

Almost surely, 2^21827335904 is an apocalyptic number.

It is an amenable number.

21827335904 is an abundant number, since it is smaller than the sum of its proper divisors (25051829464).

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

21827335904 is a wasteful number, since it uses less digits than its factorization.

21827335904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62009498 (or 62009490 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 21827335904 in words is "twenty-one billion, eight hundred twenty-seven million, three hundred thirty-five thousand, nine hundred four".