18137191211 has 2 divisors, whose sum is σ = 18137191212. Its totient is φ = 18137191210.

The previous prime is 18137191207. The next prime is 18137191229. The reversal of 18137191211 is 11219173181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18137191211 - 2² = 18137191207 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18137191201) 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, 9068595605 + 9068595606.

It is an arithmetic number, because the mean of its divisors is an integer number (9068595606).

Almost surely, 2^18137191211 is an apocalyptic number.

18137191211 is a deficient number, since it is larger than the sum of its proper divisors (1).

18137191211 is an equidigital number, since it uses as much as digits as its factorization.

18137191211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 35.

The spelling of 18137191211 in words is "eighteen billion, one hundred thirty-seven million, one hundred ninety-one thousand, two hundred eleven".