204421020304 has 80 divisors (see below), whose sum is σ = 430543693440. Its totient is φ = 93764971520.

The previous prime is 204421020289. The next prime is 204421020337. The reversal of 204421020304 is 403020124402.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 775374 + ... + 1005010.

It is an arithmetic number, because the mean of its divisors is an integer number (5381796168).

Almost surely, 2^204421020304 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 204421020304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215271846720).

204421020304 is an abundant number, since it is smaller than the sum of its proper divisors (226122673136).

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

204421020304 is a wasteful number, since it uses less digits than its factorization.

204421020304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229768 (or 229762 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 204421020304 its reverse (403020124402), we get a palindrome (607441144706).

The spelling of 204421020304 in words is "two hundred four billion, four hundred twenty-one million, twenty thousand, three hundred four".