203105804 has 24 divisors (see below), whose sum is σ = 391314000. Its totient is φ = 91471680.

The previous prime is 203105729. The next prime is 203105807. The reversal of 203105804 is 408501302.

It is a self number, because there is not a number n which added to its sum of digits gives 203105804.

It is not an unprimeable number, because it can be changed into a prime (203105807) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16379 + ... + 25970.

It is an arithmetic number, because the mean of its divisors is an integer number (16304750).

Almost surely, 2^203105804 is an apocalyptic number.

It is an amenable number.

203105804 is a deficient number, since it is larger than the sum of its proper divisors (188208196).

203105804 is a wasteful number, since it uses less digits than its factorization.

203105804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42473 (or 42471 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 203105804 is about 14251.5193575983. The cubic root of 203105804 is about 587.8151539230.

The spelling of 203105804 in words is "two hundred three million, one hundred five thousand, eight hundred four".