18036508099 has 2 divisors, whose sum is σ = 18036508100. Its totient is φ = 18036508098.

The previous prime is 18036508073. The next prime is 18036508103. The reversal of 18036508099 is 99080563081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18036508099 - 2⁷ = 18036507971 is a prime.

It is not a weakly prime, because it can be changed into another prime (18036508019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9018254049 + 9018254050.

It is an arithmetic number, because the mean of its divisors is an integer number (9018254050).

Almost surely, 2^18036508099 is an apocalyptic number.

18036508099 is a deficient number, since it is larger than the sum of its proper divisors (1).

18036508099 is an equidigital number, since it uses as much as digits as its factorization.

18036508099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 18036508099 in words is "eighteen billion, thirty-six million, five hundred eight thousand, ninety-nine".