204350405 has 16 divisors (see below), whose sum is σ = 286771584. Its totient is φ = 136866240.

The previous prime is 204350401. The next prime is 204350413. The reversal of 204350405 is 504053402.

It is not a de Polignac number, because 204350405 - 2² = 204350401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204350401) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 66386 + ... + 69395.

It is an arithmetic number, because the mean of its divisors is an integer number (17923224).

Almost surely, 2^204350405 is an apocalyptic number.

It is an amenable number.

204350405 is a deficient number, since it is larger than the sum of its proper divisors (82421179).

204350405 is a wasteful number, since it uses less digits than its factorization.

204350405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135836.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 204350405 is about 14295.1182226661. The cubic root of 204350405 is about 589.0133898718.

The spelling of 204350405 in words is "two hundred four million, three hundred fifty thousand, four hundred five".