18468337529 has 2 divisors, whose sum is σ = 18468337530. Its totient is φ = 18468337528.

The previous prime is 18468337507. The next prime is 18468337561. The reversal of 18468337529 is 92573386481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16319551504 + 2148786025 = 127748^2 + 46355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18468337529 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18468337429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9234168764 + 9234168765.

It is an arithmetic number, because the mean of its divisors is an integer number (9234168765).

Almost surely, 2^18468337529 is an apocalyptic number.

It is an amenable number.

18468337529 is a deficient number, since it is larger than the sum of its proper divisors (1).

18468337529 is an equidigital number, since it uses as much as digits as its factorization.

18468337529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 56.

The spelling of 18468337529 in words is "eighteen billion, four hundred sixty-eight million, three hundred thirty-seven thousand, five hundred twenty-nine".