18087022144 has 21 divisors (see below), whose sum is σ = 35893569691. Its totient is φ = 9042973120.

The previous prime is 18087022133. The next prime is 18087022181. The reversal of 18087022144 is 44122078081.

It is a happy number.

The square root of 18087022144 is 134488.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1067499 + ... + 1084309.

Almost surely, 2^18087022144 is an apocalyptic number.

18087022144 is the 134488-th square number.

It is an amenable number.

18087022144 is a deficient number, since it is larger than the sum of its proper divisors (17806547547).

18087022144 is an frugal number, since it uses more digits than its factorization.

18087022144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33634 (or 16813 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 37.

The spelling of 18087022144 in words is "eighteen billion, eighty-seven million, twenty-two thousand, one hundred forty-four".