203320394 has 16 divisors (see below), whose sum is σ = 312822216. Its totient is φ = 99052800.

The previous prime is 203320393. The next prime is 203320399. The reversal of 203320394 is 493023302.

It can be written as a sum of positive squares in 4 ways, for example, as 178569769 + 24750625 = 13363^2 + 4975^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (203320393) 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 7 ways as a sum of consecutive naturals, for example, 107384 + ... + 109260.

Almost surely, 2^203320394 is an apocalyptic number.

203320394 is a deficient number, since it is larger than the sum of its proper divisors (109501822).

203320394 is a wasteful number, since it uses less digits than its factorization.

203320394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3241.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 203320394 is about 14259.0460410225. The cubic root of 203320394 is about 588.0220983720.

Adding to 203320394 its reverse (493023302), we get a palindrome (696343696).

The spelling of 203320394 in words is "two hundred three million, three hundred twenty thousand, three hundred ninety-four".