18382928209 has 2 divisors, whose sum is σ = 18382928210. Its totient is φ = 18382928208.

The previous prime is 18382928191. The next prime is 18382928281. The reversal of 18382928209 is 90282928381.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18340743184 + 42185025 = 135428^2 + 6495^2 .

It is a cyclic number.

It is not a de Polignac number, because 18382928209 - 2⁵ = 18382928177 is a prime.

It is not a weakly prime, because it can be changed into another prime (18382928299) 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, 9191464104 + 9191464105.

It is an arithmetic number, because the mean of its divisors is an integer number (9191464105).

Almost surely, 2^18382928209 is an apocalyptic number.

It is an amenable number.

18382928209 is a deficient number, since it is larger than the sum of its proper divisors (1).

18382928209 is an equidigital number, since it uses as much as digits as its factorization.

18382928209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 52.

The spelling of 18382928209 in words is "eighteen billion, three hundred eighty-two million, nine hundred twenty-eight thousand, two hundred nine".