18325161 has 6 divisors (see below), whose sum is σ = 26469690. Its totient is φ = 12216768.

The previous prime is 18325147. The next prime is 18325163. The reversal of 18325161 is 16152381.

It can be written as a sum of positive squares in only one way, i.e., 9734400 + 8590761 = 3120^2 + 2931^2 .

It is not a de Polignac number, because 18325161 - 2⁷ = 18325033 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18325163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1018056 + ... + 1018073.

It is an arithmetic number, because the mean of its divisors is an integer number (4411615).

Almost surely, 2^18325161 is an apocalyptic number.

It is an amenable number.

18325161 is a deficient number, since it is larger than the sum of its proper divisors (8144529).

18325161 is a wasteful number, since it uses less digits than its factorization.

18325161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036135 (or 2036132 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 18325161 is about 4280.7897635834. The cubic root of 18325161 is about 263.6428106772.

The spelling of 18325161 in words is "eighteen million, three hundred twenty-five thousand, one hundred sixty-one".