18127313 has 2 divisors, whose sum is σ = 18127314. Its totient is φ = 18127312.

The previous prime is 18127301. The next prime is 18127327. The reversal of 18127313 is 31372181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15460624 + 2666689 = 3932^2 + 1633^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18127313 is a prime.

It is not a weakly prime, because it can be changed into another prime (18127513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9063656 + 9063657.

It is an arithmetic number, because the mean of its divisors is an integer number (9063657).

Almost surely, 2^18127313 is an apocalyptic number.

It is an amenable number.

18127313 is a deficient number, since it is larger than the sum of its proper divisors (1).

18127313 is an equidigital number, since it uses as much as digits as its factorization.

18127313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 18127313 is about 4257.6182308892. The cubic root of 18127313 is about 262.6905669873.

Adding to 18127313 its reverse (31372181), we get a palindrome (49499494).

The spelling of 18127313 in words is "eighteen million, one hundred twenty-seven thousand, three hundred thirteen".