204505668 has 48 divisors (see below), whose sum is σ = 533498560. Its totient is φ = 67744512.

The previous prime is 204505661. The next prime is 204505727. The reversal of 204505668 is 866505402.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (204505661) 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, 11796 + ... + 23412.

Almost surely, 2^204505668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204505668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266749280).

204505668 is an abundant number, since it is smaller than the sum of its proper divisors (328992892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204505668 is a wasteful number, since it uses less digits than its factorization.

204505668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11793 (or 11785 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 204505668 is about 14300.5478216745. The cubic root of 204505668 is about 589.1625272230.

The spelling of 204505668 in words is "two hundred four million, five hundred five thousand, six hundred sixty-eight".