204113985 has 16 divisors (see below), whose sum is σ = 345793536. Its totient is φ = 102457088.

The previous prime is 204113963. The next prime is 204113989. The reversal of 204113985 is 589311402.

It is a cyclic number.

It is not a de Polignac number, because 204113985 - 2⁸ = 204113729 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204113989) 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, 399969 + ... + 400478.

It is an arithmetic number, because the mean of its divisors is an integer number (21612096).

Almost surely, 2^204113985 is an apocalyptic number.

It is an amenable number.

204113985 is a deficient number, since it is larger than the sum of its proper divisors (141679551).

204113985 is a wasteful number, since it uses less digits than its factorization.

204113985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800472.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 204113985 is about 14286.8465729845. The cubic root of 204113985 is about 588.7861522781.

The spelling of 204113985 in words is "two hundred four million, one hundred thirteen thousand, nine hundred eighty-five".