18616799 has 2 divisors, whose sum is σ = 18616800. Its totient is φ = 18616798.

The previous prime is 18616781. The next prime is 18616813. The reversal of 18616799 is 99761681.

It is a strong prime.

It is an emirp because it is prime and its reverse (99761681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18616799 - 2¹² = 18612703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18616739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9308399 + 9308400.

It is an arithmetic number, because the mean of its divisors is an integer number (9308400).

Almost surely, 2^18616799 is an apocalyptic number.

18616799 is a deficient number, since it is larger than the sum of its proper divisors (1).

18616799 is an equidigital number, since it uses as much as digits as its factorization.

18616799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 47.

The square root of 18616799 is about 4314.7188784439. The cubic root of 18616799 is about 265.0340480757.

The spelling of 18616799 in words is "eighteen million, six hundred sixteen thousand, seven hundred ninety-nine".