18885981985799 has 16 divisors (see below), whose sum is σ = 19593698472000. Its totient is φ = 18182041221120.

The previous prime is 18885981985789. The next prime is 18885981985817. The reversal of 18885981985799 is 99758918958881.

It is a cyclic number.

It is not a de Polignac number, because 18885981985799 - 2¹⁶ = 18885981920263 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 (18885981985789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104738279 + ... + 104918439.

It is an arithmetic number, because the mean of its divisors is an integer number (1224606154500).

Almost surely, 2^{18885981985799} is an apocalyptic number.

18885981985799 is a deficient number, since it is larger than the sum of its proper divisors (707716486201).

18885981985799 is a wasteful number, since it uses less digits than its factorization.

18885981985799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190618.

The product of its digits is 37623398400, while the sum is 95.

The spelling of 18885981985799 in words is "eighteen trillion, eight hundred eighty-five billion, nine hundred eighty-one million, nine hundred eighty-five thousand, seven hundred ninety-nine".