18666853685 has 8 divisors (see below), whose sum is σ = 22489469856. Its totient is φ = 14873986000.

The previous prime is 18666853669. The next prime is 18666853687. The reversal of 18666853685 is 58635866681.

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

It is not a de Polignac number, because 18666853685 - 2⁴ = 18666853669 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 (18666853687) 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, 7435739 + ... + 7438248.

It is an arithmetic number, because the mean of its divisors is an integer number (2811183732).

Almost surely, 2^18666853685 is an apocalyptic number.

It is an amenable number.

18666853685 is a deficient number, since it is larger than the sum of its proper divisors (3822616171).

18666853685 is a wasteful number, since it uses less digits than its factorization.

18666853685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14874243.

The product of its digits is 49766400, while the sum is 62.

The spelling of 18666853685 in words is "eighteen billion, six hundred sixty-six million, eight hundred fifty-three thousand, six hundred eighty-five".