18317189 has 8 divisors (see below), whose sum is σ = 20189568. Its totient is φ = 16479360.

The previous prime is 18317153. The next prime is 18317203. The reversal of 18317189 is 98171381.

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 18317189 - 2²⁰ = 17268613 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 (18317989) 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, 7517 + ... + 9650.

It is an arithmetic number, because the mean of its divisors is an integer number (2523696).

Almost surely, 2^18317189 is an apocalyptic number.

It is an amenable number.

18317189 is a deficient number, since it is larger than the sum of its proper divisors (1872379).

18317189 is a wasteful number, since it uses less digits than its factorization.

18317189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17275.

The product of its digits is 12096, while the sum is 38.

The square root of 18317189 is about 4279.8585256992. The cubic root of 18317189 is about 263.6045742630.

The spelling of 18317189 in words is "eighteen million, three hundred seventeen thousand, one hundred eighty-nine".