18008017157 has 8 divisors (see below), whose sum is σ = 19403983200. Its totient is φ = 16613584560.

The previous prime is 18008017151. The next prime is 18008017169. The reversal of 18008017157 is 75171080081.

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 18008017157 - 2¹⁰ = 18008016133 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 18008017157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18008017151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358907 + ... + 405992.

It is an arithmetic number, because the mean of its divisors is an integer number (2425497900).

Almost surely, 2^18008017157 is an apocalyptic number.

It is an amenable number.

18008017157 is a deficient number, since it is larger than the sum of its proper divisors (1395966043).

18008017157 is a wasteful number, since it uses less digits than its factorization.

18008017157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766723.

The product of its (nonzero) digits is 15680, while the sum is 38.

The spelling of 18008017157 in words is "eighteen billion, eight million, seventeen thousand, one hundred fifty-seven".