18163085 has 8 divisors (see below), whose sum is σ = 21818616. Its totient is φ = 14515200.

The previous prime is 18163081. The next prime is 18163109. The reversal of 18163085 is 58036181.

It can be written as a sum of positive squares in 4 ways, for example, as 1630729 + 16532356 = 1277^2 + 4066^2 .

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

It is not a de Polignac number, because 18163085 - 2² = 18163081 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 (18163081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7997 + ... + 10013.

It is an arithmetic number, because the mean of its divisors is an integer number (2727327).

Almost surely, 2^18163085 is an apocalyptic number.

It is an amenable number.

18163085 is a deficient number, since it is larger than the sum of its proper divisors (3655531).

18163085 is a wasteful number, since it uses less digits than its factorization.

18163085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 18163085 is about 4261.8171007212. The cubic root of 18163085 is about 262.8632491802.

The spelling of 18163085 in words is "eighteen million, one hundred sixty-three thousand, eighty-five".