18682613691 has 32 divisors (see below), whose sum is σ = 28701173760. Its totient is φ = 10588755456.

The previous prime is 18682613689. The next prime is 18682613707. The reversal of 18682613691 is 19631628681.

It is not a de Polignac number, because 18682613691 - 2¹ = 18682613689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18682613591) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4765230 + ... + 4769148.

It is an arithmetic number, because the mean of its divisors is an integer number (896911680).

Almost surely, 2^18682613691 is an apocalyptic number.

18682613691 is a deficient number, since it is larger than the sum of its proper divisors (10018560069).

18682613691 is a wasteful number, since it uses less digits than its factorization.

18682613691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723.

The product of its digits is 746496, while the sum is 51.

The spelling of 18682613691 in words is "eighteen billion, six hundred eighty-two million, six hundred thirteen thousand, six hundred ninety-one".