18849173 has 12 divisors (see below), whose sum is σ = 22014540. Its totient is φ = 16091712.

The previous prime is 18849161. The next prime is 18849211. The reversal of 18849173 is 37194881.

It can be written as a sum of positive squares in 2 ways, for example, as 9102289 + 9746884 = 3017^2 + 3122^2 .

It is not a de Polignac number, because 18849173 - 2⁸ = 18848917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18849173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18849133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14723 + ... + 15951.

It is an arithmetic number, because the mean of its divisors is an integer number (1834545).

Almost surely, 2^18849173 is an apocalyptic number.

It is an amenable number.

18849173 is a deficient number, since it is larger than the sum of its proper divisors (3165367).

18849173 is a wasteful number, since it uses less digits than its factorization.

18849173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556 (or 1549 counting only the distinct ones).

The product of its digits is 48384, while the sum is 41.

The square root of 18849173 is about 4341.5634280752. The cubic root of 18849173 is about 266.1322057491.

The spelling of 18849173 in words is "eighteen million, eight hundred forty-nine thousand, one hundred seventy-three".