320196818 has 6 divisors (see below), whose sum is σ = 480333189. Its totient is φ = 160085756.

The previous prime is 320196817. The next prime is 320196827. The reversal of 320196818 is 818691023.

It can be written as a sum of positive squares in 2 ways, for example, as 180176929 + 140019889 = 13423^2 + 11833^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=12653.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320196817) 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 in 2 ways as a sum of consecutive naturals, for example, 18980 + ... + 31632.

Almost surely, 2^320196818 is an apocalyptic number.

320196818 is a deficient number, since it is larger than the sum of its proper divisors (160136371).

320196818 is an frugal number, since it uses more digits than its factorization.

320196818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25308 (or 12655 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 320196818 is about 17894.0442047068. The cubic root of 320196818 is about 684.1305807830.

The spelling of 320196818 in words is "three hundred twenty million, one hundred ninety-six thousand, eight hundred eighteen".