18228173 has 8 divisors (see below), whose sum is σ = 18910848. Its totient is φ = 17557344.

The previous prime is 18228157. The next prime is 18228191. The reversal of 18228173 is 37182281.

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 18228173 - 2⁴ = 18228157 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 (18228073) 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, 236 + ... + 6042.

It is an arithmetic number, because the mean of its divisors is an integer number (2363856).

Almost surely, 2^18228173 is an apocalyptic number.

It is an amenable number.

18228173 is a deficient number, since it is larger than the sum of its proper divisors (682675).

18228173 is an equidigital number, since it uses as much as digits as its factorization.

18228173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5923.

The product of its digits is 5376, while the sum is 32.

The square root of 18228173 is about 4269.4464512393. The cubic root of 18228173 is about 263.1768678299.

The spelling of 18228173 in words is "eighteen million, two hundred twenty-eight thousand, one hundred seventy-three".