204340420 has 24 divisors (see below), whose sum is σ = 430061184. Its totient is φ = 81555936.

The previous prime is 204340403. The next prime is 204340453. The reversal of 204340420 is 24043402.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1774 + ... + 20293.

It is an arithmetic number, because the mean of its divisors is an integer number (17919216).

Almost surely, 2^204340420 is an apocalyptic number.

204340420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204340420 is an abundant number, since it is smaller than the sum of its proper divisors (225720764).

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

204340420 is a wasteful number, since it uses less digits than its factorization.

204340420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22539 (or 22537 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 204340420 is about 14294.7689732993. The cubic root of 204340420 is about 589.0037962289.

Adding to 204340420 its reverse (24043402), we get a palindrome (228383822).

The spelling of 204340420 in words is "two hundred four million, three hundred forty thousand, four hundred twenty".