204004500 has 96 divisors (see below), whose sum is σ = 678961920. Its totient is φ = 46627200.

The previous prime is 204004469. The next prime is 204004511. The reversal of 204004500 is 5400402.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 204004500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 786 + ... + 20214.

It is an arithmetic number, because the mean of its divisors is an integer number (7072520).

Almost surely, 2^204004500 is an apocalyptic number.

204004500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204004500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339480960).

204004500 is an abundant number, since it is smaller than the sum of its proper divisors (474957420).

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

204004500 is a wasteful number, since it uses less digits than its factorization.

204004500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19458 (or 19446 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 204004500 is about 14283.0143877264. The cubic root of 204004500 is about 588.6808601604.

Adding to 204004500 its reverse (5400402), we get a palindrome (209404902).

The spelling of 204004500 in words is "two hundred four million, four thousand, five hundred".