18111859199 has 8 divisors (see below), whose sum is σ = 20757908640. Its totient is φ = 15480470016.

The previous prime is 18111859153. The next prime is 18111859217. The reversal of 18111859199 is 99195811181.

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 18111859199 - 2⁸ = 18111858943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18111859199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18111859499) 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, 3662414 + ... + 3667355.

It is an arithmetic number, because the mean of its divisors is an integer number (2594738580).

Almost surely, 2^18111859199 is an apocalyptic number.

18111859199 is a deficient number, since it is larger than the sum of its proper divisors (2646049441).

18111859199 is an equidigital number, since it uses as much as digits as its factorization.

18111859199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7330129.

The product of its digits is 233280, while the sum is 53.

The spelling of 18111859199 in words is "eighteen billion, one hundred eleven million, eight hundred fifty-nine thousand, one hundred ninety-nine".