18573338689 has 2 divisors, whose sum is σ = 18573338690. Its totient is φ = 18573338688.

The previous prime is 18573338671. The next prime is 18573338759. The reversal of 18573338689 is 98683337581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17788890625 + 784448064 = 133375^2 + 28008^2 .

It is a cyclic number.

It is not a de Polignac number, because 18573338689 - 2¹¹ = 18573336641 is a prime.

It is not a weakly prime, because it can be changed into another prime (18573338629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9286669344 + 9286669345.

It is an arithmetic number, because the mean of its divisors is an integer number (9286669345).

Almost surely, 2^18573338689 is an apocalyptic number.

It is an amenable number.

18573338689 is a deficient number, since it is larger than the sum of its proper divisors (1).

18573338689 is an equidigital number, since it uses as much as digits as its factorization.

18573338689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26127360, while the sum is 61.

It can be divided in two parts, 185733 and 38689, that added together give a palindrome (224422).

The spelling of 18573338689 in words is "eighteen billion, five hundred seventy-three million, three hundred thirty-eight thousand, six hundred eighty-nine".