18057090559 has 4 divisors (see below), whose sum is σ = 18059587416. Its totient is φ = 18054593704.

The previous prime is 18057090547. The next prime is 18057090587. The reversal of 18057090559 is 95509075081.

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

It is a cyclic number.

It is not a de Polignac number, because 18057090559 - 2⁷ = 18057090431 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18057090509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1237549 + ... + 1252054.

It is an arithmetic number, because the mean of its divisors is an integer number (4514896854).

Almost surely, 2^18057090559 is an apocalyptic number.

18057090559 is a deficient number, since it is larger than the sum of its proper divisors (2496857).

18057090559 is an equidigital number, since it uses as much as digits as its factorization.

18057090559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496856.

The product of its (nonzero) digits is 567000, while the sum is 49.

The spelling of 18057090559 in words is "eighteen billion, fifty-seven million, ninety thousand, five hundred fifty-nine".