18682604917 has 4 divisors (see below), whose sum is σ = 18716146956. Its totient is φ = 18649062880.

The previous prime is 18682604911. The next prime is 18682604921. The reversal of 18682604917 is 71940628681.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6415048836 + 12267556081 = 80094^2 + 110759^2 .

It is a cyclic number.

It is not a de Polignac number, because 18682604917 - 2³ = 18682604909 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 (18682604911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16770184 + ... + 16771297.

It is an arithmetic number, because the mean of its divisors is an integer number (4679036739).

Almost surely, 2^18682604917 is an apocalyptic number.

It is an amenable number.

18682604917 is a deficient number, since it is larger than the sum of its proper divisors (33542039).

18682604917 is an equidigital number, since it uses as much as digits as its factorization.

18682604917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33542038.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 18682604917 in words is "eighteen billion, six hundred eighty-two million, six hundred four thousand, nine hundred seventeen".