203305930 has 24 divisors (see below), whose sum is σ = 369795276. Its totient is φ = 80476800.

The previous prime is 203305919. The next prime is 203305937. The reversal of 203305930 is 39503302.

203305930 is digitally balanced in base 2, 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 6 ways, for example, as 198781801 + 4524129 = 14099^2 + 2127^2 .

It is a junction number, because it is equal to n+sod(n) for n = 203305895 and 203305904.

It is not an unprimeable number, because it can be changed into a prime (203305937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101014 + ... + 103006.

Almost surely, 2^203305930 is an apocalyptic number.

203305930 is a deficient number, since it is larger than the sum of its proper divisors (166489346).

203305930 is a wasteful number, since it uses less digits than its factorization.

203305930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202 (or 2101 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 25.

The square root of 203305930 is about 14258.5388451973. The cubic root of 203305930 is about 588.0081542825.

The spelling of 203305930 in words is "two hundred three million, three hundred five thousand, nine hundred thirty".