18117035291 has 2 divisors, whose sum is σ = 18117035292. Its totient is φ = 18117035290.

The previous prime is 18117035227. The next prime is 18117035333. The reversal of 18117035291 is 19253071181.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (19253071181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18117035291 - 2⁶ = 18117035227 is a prime.

It is not a weakly prime, because it can be changed into another prime (18117035791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9058517645 + 9058517646.

It is an arithmetic number, because the mean of its divisors is an integer number (9058517646).

Almost surely, 2^18117035291 is an apocalyptic number.

18117035291 is a deficient number, since it is larger than the sum of its proper divisors (1).

18117035291 is an equidigital number, since it uses as much as digits as its factorization.

18117035291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 38.

The spelling of 18117035291 in words is "eighteen billion, one hundred seventeen million, thirty-five thousand, two hundred ninety-one".