18831779106 has 32 divisors (see below), whose sum is σ = 43051720320. Its totient is φ = 5379551616.

The previous prime is 18831779089. The next prime is 18831779143. The reversal of 18831779106 is 60197713881.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218920 + ... + 292556.

It is an arithmetic number, because the mean of its divisors is an integer number (1345366260).

Almost surely, 2^18831779106 is an apocalyptic number.

18831779106 is an abundant number, since it is smaller than the sum of its proper divisors (24219941214).

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

18831779106 is a wasteful number, since it uses less digits than its factorization.

18831779106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79738.

The product of its (nonzero) digits is 508032, while the sum is 51.

The spelling of 18831779106 in words is "eighteen billion, eight hundred thirty-one million, seven hundred seventy-nine thousand, one hundred six".