18031257079 has 8 divisors (see below), whose sum is σ = 19671458688. Its totient is φ = 16391221560.

The previous prime is 18031257073. The next prime is 18031257113. The reversal of 18031257079 is 97075213081.

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 18031257079 - 2³ = 18031257071 is a prime.

It is a super-2 number, since 2×18031257079² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18031257071) 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, 330244 + ... + 380950.

It is an arithmetic number, because the mean of its divisors is an integer number (2458932336).

Almost surely, 2^18031257079 is an apocalyptic number.

18031257079 is a deficient number, since it is larger than the sum of its proper divisors (1640201609).

18031257079 is a wasteful number, since it uses less digits than its factorization.

18031257079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83045.

The product of its (nonzero) digits is 105840, while the sum is 43.

The spelling of 18031257079 in words is "eighteen billion, thirty-one million, two hundred fifty-seven thousand, seventy-nine".