18697474687 has 8 divisors (see below), whose sum is σ = 18918201456. Its totient is φ = 18477318912.

The previous prime is 18697474603. The next prime is 18697474721. The reversal of 18697474687 is 78647479681.

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 18697474687 - 2⁷ = 18697474559 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 (18697474087) 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, 76693 + ... + 208030.

It is an arithmetic number, because the mean of its divisors is an integer number (2364775182).

Almost surely, 2^18697474687 is an apocalyptic number.

18697474687 is a deficient number, since it is larger than the sum of its proper divisors (220726769).

18697474687 is an equidigital number, since it uses as much as digits as its factorization.

18697474687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285497.

The product of its digits is 113799168, while the sum is 67.

The spelling of 18697474687 in words is "eighteen billion, six hundred ninety-seven million, four hundred seventy-four thousand, six hundred eighty-seven".