18099173 has 8 divisors (see below), whose sum is σ = 18588768. Its totient is φ = 17612784.

The previous prime is 18099167. The next prime is 18099199. The reversal of 18099173 is 37199081.

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 18099173 - 2¹⁶ = 18033637 is a prime.

It is a super-4 number, since 4×18099173⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18099143) 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, 14315 + ... + 15527.

It is an arithmetic number, because the mean of its divisors is an integer number (2323596).

Almost surely, 2^18099173 is an apocalyptic number.

It is an amenable number.

18099173 is a deficient number, since it is larger than the sum of its proper divisors (489595).

18099173 is a wasteful number, since it uses less digits than its factorization.

18099173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 18099173 is about 4254.3122828490. The cubic root of 18099173 is about 262.5545670386.

The spelling of 18099173 in words is "eighteen million, ninety-nine thousand, one hundred seventy-three".