18094217 has 4 divisors (see below), whose sum is σ = 18152340. Its totient is φ = 18036096.

The previous prime is 18094211. The next prime is 18094229. The reversal of 18094217 is 71249081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2876416 + 15217801 = 1696^2 + 3901^2 .

It is a cyclic number.

It is not a de Polignac number, because 18094217 - 2⁸ = 18093961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18094211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28592 + ... + 29217.

It is an arithmetic number, because the mean of its divisors is an integer number (4538085).

Almost surely, 2^18094217 is an apocalyptic number.

It is an amenable number.

18094217 is a deficient number, since it is larger than the sum of its proper divisors (58123).

18094217 is an equidigital number, since it uses as much as digits as its factorization.

18094217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58122.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 18094217 is about 4253.7297751503. The cubic root of 18094217 is about 262.5306002120.

The spelling of 18094217 in words is "eighteen million, ninety-four thousand, two hundred seventeen".