18859136685 has 8 divisors (see below), whose sum is σ = 30174618720. Its totient is φ = 10058206224.

The previous prime is 18859136599. The next prime is 18859136693. The reversal of 18859136685 is 58663195881.

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

It is not a de Polignac number, because 18859136685 - 2⁹ = 18859136173 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628637875 + ... + 628637904.

It is an arithmetic number, because the mean of its divisors is an integer number (3771827340).

Almost surely, 2^18859136685 is an apocalyptic number.

18859136685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18859136685 is a deficient number, since it is larger than the sum of its proper divisors (11315482035).

18859136685 is a wasteful number, since it uses less digits than its factorization.

18859136685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257275787.

The product of its digits is 12441600, while the sum is 60.

The spelling of 18859136685 in words is "eighteen billion, eight hundred fifty-nine million, one hundred thirty-six thousand, six hundred eighty-five".