18005188911 has 16 divisors (see below), whose sum is σ = 24084272640. Its totient is φ = 11964839040.

The previous prime is 18005188841. The next prime is 18005189017. The reversal of 18005188911 is 11988150081.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-18005188911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18005188111) 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, 1409031 + ... + 1421751.

It is an arithmetic number, because the mean of its divisors is an integer number (1505267040).

Almost surely, 2^18005188911 is an apocalyptic number.

18005188911 is a deficient number, since it is larger than the sum of its proper divisors (6079083729).

18005188911 is a wasteful number, since it uses less digits than its factorization.

18005188911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14206.

The product of its (nonzero) digits is 23040, while the sum is 42.

The spelling of 18005188911 in words is "eighteen billion, five million, one hundred eighty-eight thousand, nine hundred eleven".