18711361187 has 2 divisors, whose sum is σ = 18711361188. Its totient is φ = 18711361186.

The previous prime is 18711361181. The next prime is 18711361211. The reversal of 18711361187 is 78116311781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18711361187 - 2⁸ = 18711360931 is a prime.

It is not a weakly prime, because it can be changed into another prime (18711361181) 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, 9355680593 + 9355680594.

It is an arithmetic number, because the mean of its divisors is an integer number (9355680594).

Almost surely, 2^18711361187 is an apocalyptic number.

18711361187 is a deficient number, since it is larger than the sum of its proper divisors (1).

18711361187 is an equidigital number, since it uses as much as digits as its factorization.

18711361187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 44.

The spelling of 18711361187 in words is "eighteen billion, seven hundred eleven million, three hundred sixty-one thousand, one hundred eighty-seven".