203320420 has 24 divisors (see below), whose sum is σ = 428211000. Its totient is φ = 81092352.

The previous prime is 203320399. The next prime is 203320433. The reversal of 203320420 is 24023302.

It can be written as a sum of positive squares in 4 ways, for example, as 19501056 + 183819364 = 4416^2 + 13558^2 .

It is a junction number, because it is equal to n+sod(n) for n = 203320394 and 203320403.

It is an unprimeable number.

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, 7585 + ... + 21544.

It is an arithmetic number, because the mean of its divisors is an integer number (17842125).

Almost surely, 2^203320420 is an apocalyptic number.

203320420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203320420 is an abundant number, since it is smaller than the sum of its proper divisors (224890580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203320420 is a wasteful number, since it uses less digits than its factorization.

203320420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29487 (or 29485 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 203320420 is about 14259.0469527244. The cubic root of 203320420 is about 588.0221234368.

Adding to 203320420 its reverse (24023302), we get a palindrome (227343722).

The spelling of 203320420 in words is "two hundred three million, three hundred twenty thousand, four hundred twenty".