18121316327 has 2 divisors, whose sum is σ = 18121316328. Its totient is φ = 18121316326.

The previous prime is 18121316293. The next prime is 18121316357. The reversal of 18121316327 is 72361312181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18121316327 - 2²⁴ = 18104539111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18121316357) 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, 9060658163 + 9060658164.

It is an arithmetic number, because the mean of its divisors is an integer number (9060658164).

Almost surely, 2^18121316327 is an apocalyptic number.

18121316327 is a deficient number, since it is larger than the sum of its proper divisors (1).

18121316327 is an equidigital number, since it uses as much as digits as its factorization.

18121316327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The spelling of 18121316327 in words is "eighteen billion, one hundred twenty-one million, three hundred sixteen thousand, three hundred twenty-seven".