18131252579 has 8 divisors (see below), whose sum is σ = 20050501872. Its totient is φ = 16257162240.

The previous prime is 18131252551. The next prime is 18131252609. The reversal of 18131252579 is 97525213181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18131252579 - 2²⁰ = 18130204003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18131252549) 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, 11288894 + ... + 11290499.

It is an arithmetic number, because the mean of its divisors is an integer number (2506312734).

Almost surely, 2^18131252579 is an apocalyptic number.

18131252579 is a deficient number, since it is larger than the sum of its proper divisors (1919249293).

18131252579 is a wasteful number, since it uses less digits than its factorization.

18131252579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22579477.

The product of its digits is 151200, while the sum is 44.

The spelling of 18131252579 in words is "eighteen billion, one hundred thirty-one million, two hundred fifty-two thousand, five hundred seventy-nine".