18811888099 has 16 divisors (see below), whose sum is σ = 19696320000. Its totient is φ = 17950870080.

The previous prime is 18811888097. The next prime is 18811888129. The reversal of 18811888099 is 99088811881.

It is a cyclic number.

It is not a de Polignac number, because 18811888099 - 2¹ = 18811888097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18811888091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 461842 + ... + 500920.

It is an arithmetic number, because the mean of its divisors is an integer number (1231020000).

Almost surely, 2^18811888099 is an apocalyptic number.

18811888099 is a deficient number, since it is larger than the sum of its proper divisors (884431901).

18811888099 is a wasteful number, since it uses less digits than its factorization.

18811888099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39378.

The product of its (nonzero) digits is 2654208, while the sum is 61.

The spelling of 18811888099 in words is "eighteen billion, eight hundred eleven million, eight hundred eighty-eight thousand, ninety-nine".