18505893320894 has 16 divisors (see below), whose sum is σ = 32747755923456. Its totient is φ = 7675255294200.

The previous prime is 18505893320869. The next prime is 18505893320927. The reversal of 18505893320894 is 49802339850581.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18505893320894.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21320153162 + ... + 21320154029.

It is an arithmetic number, because the mean of its divisors is an integer number (2046734745216).

Almost surely, 2^{18505893320894} is an apocalyptic number.

18505893320894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18505893320894 is a deficient number, since it is larger than the sum of its proper divisors (14241862602562).

18505893320894 is a wasteful number, since it uses less digits than its factorization.

18505893320894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42640307231.

The product of its (nonzero) digits is 74649600, while the sum is 65.

The spelling of 18505893320894 in words is "eighteen trillion, five hundred five billion, eight hundred ninety-three million, three hundred twenty thousand, eight hundred ninety-four".