18163009 has 8 divisors (see below), whose sum is σ = 18616320. Its totient is φ = 17712576.

The previous prime is 18163003. The next prime is 18163039. The reversal of 18163009 is 90036181.

It is a happy number.

18163009 is nontrivially palindromic in base 8.

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 18163009 - 2³ = 18163001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18163001) 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, 17497 + ... + 18505.

It is an arithmetic number, because the mean of its divisors is an integer number (2327040).

Almost surely, 2^18163009 is an apocalyptic number.

It is an amenable number.

18163009 is a deficient number, since it is larger than the sum of its proper divisors (453311).

18163009 is a wasteful number, since it uses less digits than its factorization.

18163009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 18163009 is about 4261.8081843274. The cubic root of 18163009 is about 262.8628825458.

It can be divided in two parts, 181 and 63009, that added together give a triangular number (63190 = T₃₅₅).

The spelling of 18163009 in words is "eighteen million, one hundred sixty-three thousand, nine".