18326313 has 6 divisors (see below), whose sum is σ = 26471354. Its totient is φ = 12217536.

The previous prime is 18326311. The next prime is 18326333. The reversal of 18326313 is 31362381.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9753129 + 8573184 = 3123^2 + 2928^2 .

It is not a de Polignac number, because 18326313 - 2¹ = 18326311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18326311) 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, 1018120 + ... + 1018137.

Almost surely, 2^18326313 is an apocalyptic number.

It is an amenable number.

18326313 is a deficient number, since it is larger than the sum of its proper divisors (8145041).

18326313 is a wasteful number, since it uses less digits than its factorization.

18326313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036263 (or 2036260 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 18326313 is about 4280.9243160794. The cubic root of 18326313 is about 263.6483351426.

Adding to 18326313 its reverse (31362381), we get a palindrome (49688694).

The spelling of 18326313 in words is "eighteen million, three hundred twenty-six thousand, three hundred thirteen".