204243004 has 48 divisors (see below), whose sum is σ = 424488960. Its totient is φ = 84142080.

The previous prime is 204242999. The next prime is 204243007. The reversal of 204243004 is 400342402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204243007) 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, 144252 + ... + 145660.

It is an arithmetic number, because the mean of its divisors is an integer number (8843520).

Almost surely, 2^204243004 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 204243004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212244480).

204243004 is an abundant number, since it is smaller than the sum of its proper divisors (220245956).

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

204243004 is a wasteful number, since it uses less digits than its factorization.

204243004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618 (or 1616 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 204243004 is about 14291.3611668028. The cubic root of 204243004 is about 588.9101819971.

Adding to 204243004 its reverse (400342402), we get a palindrome (604585406).

The spelling of 204243004 in words is "two hundred four million, two hundred forty-three thousand, four".