18042589 has 8 divisors (see below), whose sum is σ = 18703872. Its totient is φ = 17386320.

The previous prime is 18042587. The next prime is 18042599. The reversal of 18042589 is 98524081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18042589 - 2¹ = 18042587 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 (18042581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7047 + ... + 9259.

It is an arithmetic number, because the mean of its divisors is an integer number (2337984).

Almost surely, 2^18042589 is an apocalyptic number.

It is an amenable number.

18042589 is a deficient number, since it is larger than the sum of its proper divisors (661283).

18042589 is a wasteful number, since it uses less digits than its factorization.

18042589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 18042589 is about 4247.6568835065. The cubic root of 18042589 is about 262.2806706095.

The spelling of 18042589 in words is "eighteen million, forty-two thousand, five hundred eighty-nine".