18668700018687 has 16 divisors (see below), whose sum is σ = 24952879848960. Its totient is φ = 12415164560832.

The previous prime is 18668700018679. The next prime is 18668700018743. The reversal of 18668700018687 is 78681000786681.

It is a happy number.

It is not a de Polignac number, because 18668700018687 - 2³ = 18668700018679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18668700018607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16402563 + ... + 17503755.

It is an arithmetic number, because the mean of its divisors is an integer number (1559554990560).

Almost surely, 2^{18668700018687} is an apocalyptic number.

18668700018687 is a deficient number, since it is larger than the sum of its proper divisors (6284179830273).

18668700018687 is a wasteful number, since it uses less digits than its factorization.

18668700018687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115102.

The product of its (nonzero) digits is 43352064, while the sum is 66.

The spelling of 18668700018687 in words is "eighteen trillion, six hundred sixty-eight billion, seven hundred million, eighteen thousand, six hundred eighty-seven".