18553389089 has 4 divisors (see below), whose sum is σ = 18646622400. Its totient is φ = 18460155780.

The previous prime is 18553389067. The next prime is 18553389119. The reversal of 18553389089 is 98098335581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98098335581 = 49277 ⋅1990753.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18553389089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18553389289) 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, 46616357 + ... + 46616754.

It is an arithmetic number, because the mean of its divisors is an integer number (4661655600).

Almost surely, 2^18553389089 is an apocalyptic number.

It is an amenable number.

18553389089 is a deficient number, since it is larger than the sum of its proper divisors (93233311).

18553389089 is an equidigital number, since it uses as much as digits as its factorization.

18553389089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93233310.

The product of its (nonzero) digits is 9331200, while the sum is 59.

The spelling of 18553389089 in words is "eighteen billion, five hundred fifty-three million, three hundred eighty-nine thousand, eighty-nine".