204121424 has 40 divisors (see below), whose sum is σ = 426972672. Its totient is φ = 93974400.

The previous prime is 204121417. The next prime is 204121447. The reversal of 204121424 is 424121402.

It is a junction number, because it is equal to n+sod(n) for n = 204121396 and 204121405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103649 + ... + 105599.

Almost surely, 2^204121424 is an apocalyptic number.

It is an amenable number.

204121424 is an abundant number, since it is smaller than the sum of its proper divisors (222851248).

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

204121424 is a wasteful number, since it uses less digits than its factorization.

204121424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2475 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 204121424 is about 14287.1069149776. The cubic root of 204121424 is about 588.7933050249.

Adding to 204121424 its reverse (424121402), we get a palindrome (628242826).

The spelling of 204121424 in words is "two hundred four million, one hundred twenty-one thousand, four hundred twenty-four".