204335643 has 4 divisors (see below), whose sum is σ = 272447528. Its totient is φ = 136223760.

The previous prime is 204335629. The next prime is 204335647. The reversal of 204335643 is 346533402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 204335643 - 2⁴ = 204335627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204335643.

It is not an unprimeable number, because it can be changed into a prime (204335647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34055938 + ... + 34055943.

It is an arithmetic number, because the mean of its divisors is an integer number (68111882).

Almost surely, 2^204335643 is an apocalyptic number.

204335643 is a deficient number, since it is larger than the sum of its proper divisors (68111885).

204335643 is an equidigital number, since it uses as much as digits as its factorization.

204335643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68111884.

The product of its (nonzero) digits is 25920, while the sum is 30.

The square root of 204335643 is about 14294.6018832285. The cubic root of 204335643 is about 588.9992063504. Note that the first 3 decimals are identical.

The spelling of 204335643 in words is "two hundred four million, three hundred thirty-five thousand, six hundred forty-three".