18617713 has 2 divisors, whose sum is σ = 18617714. Its totient is φ = 18617712.

The previous prime is 18617707. The next prime is 18617717. The reversal of 18617713 is 31771681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9659664 + 8958049 = 3108^2 + 2993^2 .

It is a cyclic number.

It is not a de Polignac number, because 18617713 - 2⁹ = 18617201 is a prime.

It is not a weakly prime, because it can be changed into another prime (18617717) 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, 9308856 + 9308857.

It is an arithmetic number, because the mean of its divisors is an integer number (9308857).

Almost surely, 2^18617713 is an apocalyptic number.

It is an amenable number.

18617713 is a deficient number, since it is larger than the sum of its proper divisors (1).

18617713 is an equidigital number, since it uses as much as digits as its factorization.

18617713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 34.

The square root of 18617713 is about 4314.8247936620. The cubic root of 18617713 is about 265.0383853260.

The spelling of 18617713 in words is "eighteen million, six hundred seventeen thousand, seven hundred thirteen".