18160013 has 2 divisors, whose sum is σ = 18160014. Its totient is φ = 18160012.

The previous prime is 18159989. The next prime is 18160027. The reversal of 18160013 is 31006181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10745284 + 7414729 = 3278^2 + 2723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18160013 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18160213) 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, 9080006 + 9080007.

It is an arithmetic number, because the mean of its divisors is an integer number (9080007).

Almost surely, 2^18160013 is an apocalyptic number.

It is an amenable number.

18160013 is a deficient number, since it is larger than the sum of its proper divisors (1).

18160013 is an equidigital number, since it uses as much as digits as its factorization.

18160013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 18160013 is about 4261.4566758328. The cubic root of 18160013 is about 262.8484286173.

Adding to 18160013 its reverse (31006181), we get a palindrome (49166194).

The spelling of 18160013 in words is "eighteen million, one hundred sixty thousand, thirteen".