18365128324 has 9 divisors (see below), whose sum is σ = 32139448887. Its totient is φ = 9182428644.

The previous prime is 18365128321. The next prime is 18365128361. The reversal of 18365128324 is 42382156381.

The square root of 18365128324 is 135518.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18365128321) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 237157 + ... + 304915.

Almost surely, 2^18365128324 is an apocalyptic number.

18365128324 is the 135518-th square number.

It is an amenable number.

18365128324 is a deficient number, since it is larger than the sum of its proper divisors (13774320563).

18365128324 is an frugal number, since it uses more digits than its factorization.

18365128324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135522 (or 67761 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

It can be divided in two parts, 18365 and 128324, that added together give a square (146689 = 383²).

The spelling of 18365128324 in words is "eighteen billion, three hundred sixty-five million, one hundred twenty-eight thousand, three hundred twenty-four".