18044087888 has 20 divisors (see below), whose sum is σ = 34965405300. Its totient is φ = 9020757504.

The previous prime is 18044087879. The next prime is 18044087909. The reversal of 18044087888 is 88878044081.

It can be written as a sum of positive squares in 2 ways, for example, as 15837719104 + 2206368784 = 125848^2 + 46972^2 .

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40856 + ... + 194312.

It is an arithmetic number, because the mean of its divisors is an integer number (1748270265).

Almost surely, 2^18044087888 is an apocalyptic number.

It is an amenable number.

18044087888 is a deficient number, since it is larger than the sum of its proper divisors (16921317412).

18044087888 is a wasteful number, since it uses less digits than its factorization.

18044087888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160814 (or 160808 counting only the distinct ones).

The product of its (nonzero) digits is 3670016, while the sum is 56.

The spelling of 18044087888 in words is "eighteen billion, forty-four million, eighty-seven thousand, eight hundred eighty-eight".