18682613689 has 2 divisors, whose sum is σ = 18682613690. Its totient is φ = 18682613688.

The previous prime is 18682613669. The next prime is 18682613707. The reversal of 18682613689 is 98631628681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16134080400 + 2548533289 = 127020^2 + 50483^2 .

It is a cyclic number.

It is not a de Polignac number, because 18682613689 - 2⁷ = 18682613561 is a prime.

It is not a weakly prime, because it can be changed into another prime (18682613669) 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, 9341306844 + 9341306845.

It is an arithmetic number, because the mean of its divisors is an integer number (9341306845).

Almost surely, 2^18682613689 is an apocalyptic number.

It is an amenable number.

18682613689 is a deficient number, since it is larger than the sum of its proper divisors (1).

18682613689 is an equidigital number, since it uses as much as digits as its factorization.

18682613689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5971968, while the sum is 58.

The spelling of 18682613689 in words is "eighteen billion, six hundred eighty-two million, six hundred thirteen thousand, six hundred eighty-nine".