18548582191913 has 2 divisors, whose sum is σ = 18548582191914. Its totient is φ = 18548582191912.

The previous prime is 18548582191883. The next prime is 18548582191927. The reversal of 18548582191913 is 31919128584581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16475221225024 + 2073360966889 = 4058968^2 + 1439917^2 .

It is a cyclic number.

It is not a de Polignac number, because 18548582191913 - 2¹⁰ = 18548582190889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18548582191913.

It is not a weakly prime, because it can be changed into another prime (18548582191613) 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, 9274291095956 + 9274291095957.

It is an arithmetic number, because the mean of its divisors is an integer number (9274291095957).

Almost surely, 2^{18548582191913} is an apocalyptic number.

It is an amenable number.

18548582191913 is a deficient number, since it is larger than the sum of its proper divisors (1).

18548582191913 is an equidigital number, since it uses as much as digits as its factorization.

18548582191913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24883200, while the sum is 65.

The spelling of 18548582191913 in words is "eighteen trillion, five hundred forty-eight billion, five hundred eighty-two million, one hundred ninety-one thousand, nine hundred thirteen".