18097009 has 8 divisors (see below), whose sum is σ = 21072960. Its totient is φ = 15218736.

The previous prime is 18097003. The next prime is 18097019. The reversal of 18097009 is 90079081.

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 18097009 - 2¹⁹ = 17572721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18097003) 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, 24019 + ... + 24760.

It is an arithmetic number, because the mean of its divisors is an integer number (2634120).

Almost surely, 2^18097009 is an apocalyptic number.

It is an amenable number.

18097009 is a deficient number, since it is larger than the sum of its proper divisors (2975951).

18097009 is an equidigital number, since it uses as much as digits as its factorization.

18097009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48839.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 18097009 is about 4254.0579450684. The cubic root of 18097009 is about 262.5441026428.

The spelling of 18097009 in words is "eighteen million, ninety-seven thousand, nine".