18518671120087 has 8 divisors (see below), whose sum is σ = 18558890000640. Its totient is φ = 18478453196280.

The previous prime is 18518671120051. The next prime is 18518671120111. The reversal of 18518671120087 is 78002117681581.

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 18518671120087 - 2²³ = 18518662731479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18518671120987) 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, 49902012 + ... + 50271742.

It is an arithmetic number, because the mean of its divisors is an integer number (2319861250080).

Almost surely, 2^{18518671120087} is an apocalyptic number.

18518671120087 is a deficient number, since it is larger than the sum of its proper divisors (40218880553).

18518671120087 is a wasteful number, since it uses less digits than its factorization.

18518671120087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478373.

The product of its (nonzero) digits is 1505280, while the sum is 55.

The spelling of 18518671120087 in words is "eighteen trillion, five hundred eighteen billion, six hundred seventy-one million, one hundred twenty thousand, eighty-seven".