18396686887199 has 4 divisors (see below), whose sum is σ = 18396789621936. Its totient is φ = 18396584152464.

The previous prime is 18396686887153. The next prime is 18396686887211. The reversal of 18396686887199 is 99178868669381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18396686887199 - 2¹² = 18396686883103 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 (18396686889199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51098294 + ... + 51457059.

It is an arithmetic number, because the mean of its divisors is an integer number (4599197405484).

Almost surely, 2^{18396686887199} is an apocalyptic number.

18396686887199 is a deficient number, since it is larger than the sum of its proper divisors (102734737).

18396686887199 is a wasteful number, since it uses less digits than its factorization.

18396686887199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102734736.

The product of its digits is 13544423424, while the sum is 89.

The spelling of 18396686887199 in words is "eighteen trillion, three hundred ninety-six billion, six hundred eighty-six million, eight hundred eighty-seven thousand, one hundred ninety-nine".