18682445563 has 2 divisors, whose sum is σ = 18682445564. Its totient is φ = 18682445562.

The previous prime is 18682445513. The next prime is 18682445603. The reversal of 18682445563 is 36554428681.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18682445563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18682445563.

It is not a weakly prime, because it can be changed into another prime (18682445513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9341222781 + 9341222782.

It is an arithmetic number, because the mean of its divisors is an integer number (9341222782).

Almost surely, 2^18682445563 is an apocalyptic number.

18682445563 is a deficient number, since it is larger than the sum of its proper divisors (1).

18682445563 is an equidigital number, since it uses as much as digits as its factorization.

18682445563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5529600, while the sum is 52.

The spelling of 18682445563 in words is "eighteen billion, six hundred eighty-two million, four hundred forty-five thousand, five hundred sixty-three".