18500016685 has 8 divisors (see below), whose sum is σ = 22217660640. Its totient is φ = 14788252944.

The previous prime is 18500016683. The next prime is 18500016779. The reversal of 18500016685 is 58661000581.

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 18500016685 - 2¹ = 18500016683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18500016683) 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, 1463127 + ... + 1475716.

It is an arithmetic number, because the mean of its divisors is an integer number (2777207580).

Almost surely, 2^18500016685 is an apocalyptic number.

It is an amenable number.

18500016685 is a deficient number, since it is larger than the sum of its proper divisors (3717643955).

18500016685 is a wasteful number, since it uses less digits than its factorization.

18500016685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940107.

The product of its (nonzero) digits is 57600, while the sum is 40.

The spelling of 18500016685 in words is "eighteen billion, five hundred million, sixteen thousand, six hundred eighty-five".