18255807386923 has 16 divisors (see below), whose sum is σ = 19136519452512. Its totient is φ = 17395854336000.

The previous prime is 18255807386909. The next prime is 18255807386933. The reversal of 18255807386923 is 32968370855281.

It is a de Polignac number, because none of the positive numbers 2^k-18255807386923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18255807386933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72652983 + ... + 72903823.

It is an arithmetic number, because the mean of its divisors is an integer number (1196032465782).

Almost surely, 2^{18255807386923} is an apocalyptic number.

18255807386923 is a deficient number, since it is larger than the sum of its proper divisors (880712065589).

18255807386923 is a wasteful number, since it uses less digits than its factorization.

18255807386923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292206.

The product of its (nonzero) digits is 174182400, while the sum is 67.

The spelling of 18255807386923 in words is "eighteen trillion, two hundred fifty-five billion, eight hundred seven million, three hundred eighty-six thousand, nine hundred twenty-three".