18137009 has 8 divisors (see below), whose sum is σ = 19867680. Its totient is φ = 16420000.

The previous prime is 18136999. The next prime is 18137017. The reversal of 18137009 is 90073181.

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 18137009 - 2⁸ = 18136753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18137089) 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, 524 + ... + 6045.

It is an arithmetic number, because the mean of its divisors is an integer number (2483460).

Almost surely, 2^18137009 is an apocalyptic number.

It is an amenable number.

18137009 is a deficient number, since it is larger than the sum of its proper divisors (1730671).

18137009 is a wasteful number, since it uses less digits than its factorization.

18137009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6831.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 18137009 is about 4258.7567434640. The cubic root of 18137009 is about 262.7373949194.

The spelling of 18137009 in words is "eighteen million, one hundred thirty-seven thousand, nine".