18089555239 has 32 divisors (see below), whose sum is σ = 21312720000. Its totient is φ = 15034166784.

The previous prime is 18089555227. The next prime is 18089555249. The reversal of 18089555239 is 93255598081.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-18089555239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18089555239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18089555249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12658177 + ... + 12659605.

It is an arithmetic number, because the mean of its divisors is an integer number (666022500).

Almost surely, 2^18089555239 is an apocalyptic number.

18089555239 is a deficient number, since it is larger than the sum of its proper divisors (3223164761).

18089555239 is a wasteful number, since it uses less digits than its factorization.

18089555239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867.

The product of its (nonzero) digits is 3888000, while the sum is 55.

The spelling of 18089555239 in words is "eighteen billion, eighty-nine million, five hundred fifty-five thousand, two hundred thirty-nine".