203904020 has 12 divisors (see below), whose sum is σ = 428198484. Its totient is φ = 81561600.

The previous prime is 203904013. The next prime is 203904031. The reversal of 203904020 is 20409302.

203904020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 100922116 + 102981904 = 10046^2 + 10148^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 10195201 = 203904020 / (2 + 0 + 3 + 9 + 0 + 4 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 203903983 and 203904001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5097581 + ... + 5097620.

It is an arithmetic number, because the mean of its divisors is an integer number (35683207).

Almost surely, 2^203904020 is an apocalyptic number.

203904020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203904020 is an abundant number, since it is smaller than the sum of its proper divisors (224294464).

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

203904020 is a wasteful number, since it uses less digits than its factorization.

203904020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10195210 (or 10195208 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 203904020 is about 14279.4964897226. The cubic root of 203904020 is about 588.5841950267.

The spelling of 203904020 in words is "two hundred three million, nine hundred four thousand, twenty".