18685368370039 has 8 divisors (see below), whose sum is σ = 21931860944288. Its totient is φ = 15583164354720.

The previous prime is 18685368370037. The next prime is 18685368370063. The reversal of 18685368370039 is 93007386358681.

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 18685368370039 - 2¹ = 18685368370037 is a prime.

It is a super-2 number, since 2×18685368370039² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18685368370037) 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, 36072139452 + ... + 36072139969.

It is an arithmetic number, because the mean of its divisors is an integer number (2741482618036).

Almost surely, 2^{18685368370039} is an apocalyptic number.

18685368370039 is a deficient number, since it is larger than the sum of its proper divisors (3246492574249).

18685368370039 is an equidigital number, since it uses as much as digits as its factorization.

18685368370039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72144279465.

The product of its (nonzero) digits is 156764160, while the sum is 67.

The spelling of 18685368370039 in words is "eighteen trillion, six hundred eighty-five billion, three hundred sixty-eight million, three hundred seventy thousand, thirty-nine".