18689004379444 has 48 divisors (see below), whose sum is σ = 38339981729280. Its totient is φ = 7804924600320.

The previous prime is 18689004379391. The next prime is 18689004379471. The reversal of 18689004379444 is 44497340098681.

It is a self number, because there is not a number n which added to its sum of digits gives 18689004379444.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30705997 + ... + 31308724.

It is an arithmetic number, because the mean of its divisors is an integer number (798749619360).

Almost surely, 2^{18689004379444} is an apocalyptic number.

18689004379444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18689004379444 is an abundant number, since it is smaller than the sum of its proper divisors (19650977349836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18689004379444 is a wasteful number, since it uses less digits than its factorization.

18689004379444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62015008 (or 62015006 counting only the distinct ones).

The product of its (nonzero) digits is 167215104, while the sum is 67.

The spelling of 18689004379444 in words is "eighteen trillion, six hundred eighty-nine billion, four million, three hundred seventy-nine thousand, four hundred forty-four".