204020830 has 16 divisors (see below), whose sum is σ = 395486784. Its totient is φ = 75330720.

The previous prime is 204020821. The next prime is 204020851. The reversal of 204020830 is 38020402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 204020798 and 204020807.

It is a congruent number.

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, 784566 + ... + 784825.

It is an arithmetic number, because the mean of its divisors is an integer number (24717924).

Almost surely, 2^204020830 is an apocalyptic number.

204020830 is a deficient number, since it is larger than the sum of its proper divisors (191465954).

204020830 is a wasteful number, since it uses less digits than its factorization.

204020830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569411.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 204020830 is about 14283.5860343263. The cubic root of 204020830 is about 588.6965671701.

The spelling of 204020830 in words is "two hundred four million, twenty thousand, eight hundred thirty".