204410421 has 6 divisors (see below), whose sum is σ = 295259510. Its totient is φ = 136273608.

The previous prime is 204410419. The next prime is 204410441. The reversal of 204410421 is 124014402.

204410421 is a `hidden beast` number, since 204 + 41 + 0 + 421 = 666.

204410421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 203062500 + 1347921 = 14250^2 + 1161^2 .

It is not a de Polignac number, because 204410421 - 2¹ = 204410419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204410394 and 204410403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204410441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11356126 + ... + 11356143.

Almost surely, 2^204410421 is an apocalyptic number.

It is an amenable number.

204410421 is a deficient number, since it is larger than the sum of its proper divisors (90849089).

204410421 is a wasteful number, since it uses less digits than its factorization.

204410421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22712275 (or 22712272 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 204410421 is about 14297.2172467232. The cubic root of 204410421 is about 589.0710469919.

Adding to 204410421 its reverse (124014402), we get a palindrome (328424823).

The spelling of 204410421 in words is "two hundred four million, four hundred ten thousand, four hundred twenty-one".