21117714604 has 24 divisors (see below), whose sum is σ = 42250496288. Its totient is φ = 9047220480.

The previous prime is 21117714601. The next prime is 21117714613. The reversal of 21117714604 is 40641771112.

It is a self number, because there is not a number n which added to its sum of digits gives 21117714604.

It is not an unprimeable number, because it can be changed into a prime (21117714601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53787 + ... + 212434.

Almost surely, 2^21117714604 is an apocalyptic number.

It is an amenable number.

21117714604 is an abundant number, since it is smaller than the sum of its proper divisors (21132781684).

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

21117714604 is a wasteful number, since it uses less digits than its factorization.

21117714604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269065 (or 269063 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The spelling of 21117714604 in words is "twenty-one billion, one hundred seventeen million, seven hundred fourteen thousand, six hundred four".