21557927113 has 8 divisors (see below), whose sum is σ = 22425897600. Its totient is φ = 20698262928.

The previous prime is 21557927107. The next prime is 21557927159. The reversal of 21557927113 is 31172975512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21557927113 - 2⁹ = 21557926601 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21557927113.

It is not an unprimeable number, because it can be changed into a prime (21557927213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2071281 + ... + 2081662.

It is an arithmetic number, because the mean of its divisors is an integer number (2803237200).

Almost surely, 2^21557927113 is an apocalyptic number.

It is an amenable number.

21557927113 is a deficient number, since it is larger than the sum of its proper divisors (867970487).

21557927113 is a wasteful number, since it uses less digits than its factorization.

21557927113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4153151.

The product of its digits is 132300, while the sum is 43.

The spelling of 21557927113 in words is "twenty-one billion, five hundred fifty-seven million, nine hundred twenty-seven thousand, one hundred thirteen".