204385641 has 16 divisors (see below), whose sum is σ = 290903040. Its totient is φ = 127265040.

The previous prime is 204385639. The next prime is 204385651. The reversal of 204385641 is 146583402.

It is not a de Polignac number, because 204385641 - 2¹ = 204385639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204385651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21205 + ... + 29298.

It is an arithmetic number, because the mean of its divisors is an integer number (18181440).

Almost surely, 2^204385641 is an apocalyptic number.

It is an amenable number.

204385641 is a deficient number, since it is larger than the sum of its proper divisors (86517399).

204385641 is a wasteful number, since it uses less digits than its factorization.

204385641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50596.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 204385641 is about 14296.3506182522. The cubic root of 204385641 is about 589.0472423176.

The spelling of 204385641 in words is "two hundred four million, three hundred eighty-five thousand, six hundred forty-one".