18316013 has 2 divisors, whose sum is σ = 18316014. Its totient is φ = 18316012.

The previous prime is 18316007. The next prime is 18316031. The reversal of 18316013 is 31061381.

Together with next prime (18316031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11854249 + 6461764 = 3443^2 + 2542^2 .

It is a cyclic number.

It is not a de Polignac number, because 18316013 - 2⁸ = 18315757 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18316013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18316003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9158006 + 9158007.

It is an arithmetic number, because the mean of its divisors is an integer number (9158007).

Almost surely, 2^18316013 is an apocalyptic number.

It is an amenable number.

18316013 is a deficient number, since it is larger than the sum of its proper divisors (1).

18316013 is an equidigital number, since it uses as much as digits as its factorization.

18316013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 18316013 is about 4279.7211357751. The cubic root of 18316013 is about 263.5989328295.

Adding to 18316013 its reverse (31061381), we get a palindrome (49377394).

The spelling of 18316013 in words is "eighteen million, three hundred sixteen thousand, thirteen".