18249019589 has 4 divisors (see below), whose sum is σ = 18284047020. Its totient is φ = 18213992160.

The previous prime is 18249019531. The next prime is 18249019669. The reversal of 18249019589 is 98591094281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98591094281 = 211 ⋅467256371.

It can be written as a sum of positive squares in 2 ways, for example, as 2005517089 + 16243502500 = 44783^2 + 127450^2 .

It is a cyclic number.

It is not a de Polignac number, because 18249019589 - 2¹² = 18249015493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18249019289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17512934 + ... + 17513975.

It is an arithmetic number, because the mean of its divisors is an integer number (4571011755).

Almost surely, 2^18249019589 is an apocalyptic number.

It is an amenable number.

18249019589 is a deficient number, since it is larger than the sum of its proper divisors (35027431).

18249019589 is an equidigital number, since it uses as much as digits as its factorization.

18249019589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35027430.

The product of its (nonzero) digits is 1866240, while the sum is 56.

The spelling of 18249019589 in words is "eighteen billion, two hundred forty-nine million, nineteen thousand, five hundred eighty-nine".