18686833685 has 8 divisors (see below), whose sum is σ = 24149139000. Its totient is φ = 13799507904.

The previous prime is 18686833681. The next prime is 18686833703. The reversal of 18686833685 is 58633868681.

It can be written as a sum of positive squares in 4 ways, for example, as 763876 + 18686069809 = 874^2 + 136697^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18686833685 - 2² = 18686833681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18686833681) 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, 143744810 + ... + 143744939.

It is an arithmetic number, because the mean of its divisors is an integer number (3018642375).

Almost surely, 2^18686833685 is an apocalyptic number.

It is an amenable number.

18686833685 is a deficient number, since it is larger than the sum of its proper divisors (5462305315).

18686833685 is a wasteful number, since it uses less digits than its factorization.

18686833685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287489767.

The product of its digits is 39813120, while the sum is 62.

The spelling of 18686833685 in words is "eighteen billion, six hundred eighty-six million, eight hundred thirty-three thousand, six hundred eighty-five".