18170242 has 4 divisors (see below), whose sum is σ = 27255366. Its totient is φ = 9085120.

The previous prime is 18170233. The next prime is 18170261. The reversal of 18170242 is 24207181.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 17547721 + 622521 = 4189^2 + 789^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4542559 + ... + 4542562.

Almost surely, 2^18170242 is an apocalyptic number.

18170242 is a deficient number, since it is larger than the sum of its proper divisors (9085124).

18170242 is an equidigital number, since it uses as much as digits as its factorization.

18170242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9085123.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 18170242 is about 4262.6566833373. The cubic root of 18170242 is about 262.8977709446.

The spelling of 18170242 in words is "eighteen million, one hundred seventy thousand, two hundred forty-two".