18182364947 has 2 divisors, whose sum is σ = 18182364948. Its totient is φ = 18182364946.

The previous prime is 18182364899. The next prime is 18182365009. The reversal of 18182364947 is 74946328181.

It is a weak prime.

It is an emirp because it is prime and its reverse (74946328181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18182364947 - 2²² = 18178170643 is a prime.

It is not a weakly prime, because it can be changed into another prime (18182364047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9091182473 + 9091182474.

It is an arithmetic number, because the mean of its divisors is an integer number (9091182474).

Almost surely, 2^18182364947 is an apocalyptic number.

18182364947 is a deficient number, since it is larger than the sum of its proper divisors (1).

18182364947 is an equidigital number, since it uses as much as digits as its factorization.

18182364947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2322432, while the sum is 53.

The spelling of 18182364947 in words is "eighteen billion, one hundred eighty-two million, three hundred sixty-four thousand, nine hundred forty-seven".