18613217099 has 2 divisors, whose sum is σ = 18613217100. Its totient is φ = 18613217098.

The previous prime is 18613217081. The next prime is 18613217113. The reversal of 18613217099 is 99071231681.

It is a strong prime.

It is an emirp because it is prime and its reverse (99071231681) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18613217099 is a prime.

It is not a weakly prime, because it can be changed into another prime (18613217039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9306608549 + 9306608550.

It is an arithmetic number, because the mean of its divisors is an integer number (9306608550).

Almost surely, 2^18613217099 is an apocalyptic number.

18613217099 is a deficient number, since it is larger than the sum of its proper divisors (1).

18613217099 is an equidigital number, since it uses as much as digits as its factorization.

18613217099 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 18613217099 in words is "eighteen billion, six hundred thirteen million, two hundred seventeen thousand, ninety-nine".