204261685 has 16 divisors (see below), whose sum is σ = 258788160. Its totient is φ = 154344960.

The previous prime is 204261683. The next prime is 204261691. The reversal of 204261685 is 586162402.

It is not a de Polignac number, because 204261685 - 2¹ = 204261683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204261685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204261683) 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, 30490 + ... + 36580.

It is an arithmetic number, because the mean of its divisors is an integer number (16174260).

Almost surely, 2^204261685 is an apocalyptic number.

It is an amenable number.

204261685 is a deficient number, since it is larger than the sum of its proper divisors (54526475).

204261685 is a wasteful number, since it uses less digits than its factorization.

204261685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6468.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 204261685 is about 14292.0147285119. The cubic root of 204261685 is about 588.9281362567.

The spelling of 204261685 in words is "two hundred four million, two hundred sixty-one thousand, six hundred eighty-five".