18081374099 has 2 divisors, whose sum is σ = 18081374100. Its totient is φ = 18081374098.

The previous prime is 18081374057. The next prime is 18081374137. The reversal of 18081374099 is 99047318081.

It is a strong prime.

It is an emirp because it is prime and its reverse (99047318081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18081374099 - 2²⁸ = 17812938643 is a prime.

It is not a weakly prime, because it can be changed into another prime (18081304099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9040687049 + 9040687050.

It is an arithmetic number, because the mean of its divisors is an integer number (9040687050).

Almost surely, 2^18081374099 is an apocalyptic number.

18081374099 is a deficient number, since it is larger than the sum of its proper divisors (1).

18081374099 is an equidigital number, since it uses as much as digits as its factorization.

18081374099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 18081374099 in words is "eighteen billion, eighty-one million, three hundred seventy-four thousand, ninety-nine".