18375291089 has 4 divisors (see below), whose sum is σ = 18375577956. Its totient is φ = 18375004224.

The previous prime is 18375291079. The next prime is 18375291149. The reversal of 18375291089 is 98019257381.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7803955600 + 10571335489 = 88340^2 + 102817^2 .

It is a cyclic number.

It is not a de Polignac number, because 18375291089 - 2²⁸ = 18106855633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18375291089.

It is not an unprimeable number, because it can be changed into a prime (18375291029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397 + ... + 191709.

It is an arithmetic number, because the mean of its divisors is an integer number (4593894489).

Almost surely, 2^18375291089 is an apocalyptic number.

It is an amenable number.

18375291089 is a deficient number, since it is larger than the sum of its proper divisors (286867).

18375291089 is an equidigital number, since it uses as much as digits as its factorization.

18375291089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286866.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The spelling of 18375291089 in words is "eighteen billion, three hundred seventy-five million, two hundred ninety-one thousand, eighty-nine".