18800173 has 16 divisors (see below), whose sum is σ = 22320000. Its totient is φ = 15824256.

The previous prime is 18800153. The next prime is 18800179. The reversal of 18800173 is 37100881.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-18800173 is a prime.

It is a super-3 number, since 3×18800173³ (a number of 23 digits) contains 333 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 (18800179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19773 + ... + 20701.

It is an arithmetic number, because the mean of its divisors is an integer number (1395000).

Almost surely, 2^18800173 is an apocalyptic number.

It is an amenable number.

18800173 is a deficient number, since it is larger than the sum of its proper divisors (3519827).

18800173 is an frugal number, since it uses more digits than its factorization.

18800173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 18800173 is about 4335.9166274272. The cubic root of 18800173 is about 265.9013946614.

The spelling of 18800173 in words is "eighteen million, eight hundred thousand, one hundred seventy-three".