18405010391004 has 36 divisors (see below), whose sum is σ = 47112684833760. Its totient is φ = 6057345191040.

The previous prime is 18405010390981. The next prime is 18405010391021. The reversal of 18405010391004 is 40019301050481.

18405010391004 is a `hidden beast` number, since 1 + 8 + 40 + 501 + 0 + 3 + 9 + 100 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18405010391004.

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 11 ways as a sum of consecutive naturals, for example, 3235758477 + ... + 3235764164.

Almost surely, 2^{18405010391004} is an apocalyptic number.

It is an amenable number.

18405010391004 is an abundant number, since it is smaller than the sum of its proper divisors (28707674442756).

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

18405010391004 is a wasteful number, since it uses less digits than its factorization.

18405010391004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6471522730 (or 6471522725 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 18405010391004 in words is "eighteen trillion, four hundred five billion, ten million, three hundred ninety-one thousand, four".