16518013 has 2 divisors, whose sum is σ = 16518014. Its totient is φ = 16518012.

The previous prime is 16517983. The next prime is 16518037. The reversal of 16518013 is 31081561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16426809 + 91204 = 4053^2 + 302^2 .

It is a cyclic number.

It is not a de Polignac number, because 16518013 - 2⁵ = 16517981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16518043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8259006 + 8259007.

It is an arithmetic number, because the mean of its divisors is an integer number (8259007).

Almost surely, 2^16518013 is an apocalyptic number.

It is an amenable number.

16518013 is a deficient number, since it is larger than the sum of its proper divisors (1).

16518013 is an equidigital number, since it uses as much as digits as its factorization.

16518013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 16518013 is about 4064.2358445346. The cubic root of 16518013 is about 254.6747769850.

Adding to 16518013 its reverse (31081561), we get a palindrome (47599574).

The spelling of 16518013 in words is "sixteen million, five hundred eighteen thousand, thirteen".