204421000 has 256 divisors, whose sum is σ = 606528000. Its totient is φ = 62899200.

The previous prime is 204420977. The next prime is 204421003. The reversal of 204421000 is 124402.

204421000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (204421003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3856974 + ... + 3857026.

It is an arithmetic number, because the mean of its divisors is an integer number (2369250).

Almost surely, 2^204421000 is an apocalyptic number.

204421000 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 204421000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303264000).

204421000 is an abundant number, since it is smaller than the sum of its proper divisors (402107000).

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

204421000 is a wasteful number, since it uses less digits than its factorization.

204421000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 204421000 is about 14297.5872090364. The cubic root of 204421000 is about 589.0812090229.

Adding to 204421000 its reverse (124402), we get a palindrome (204545402).

The spelling of 204421000 in words is "two hundred four million, four hundred twenty-one thousand".