204421423420 has 24 divisors (see below), whose sum is σ = 429322791744. Its totient is φ = 81761368896.

The previous prime is 204421423403. The next prime is 204421423433. The reversal of 204421423420 is 24324124402.

It is a congruent number.

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, 214219 + ... + 674338.

It is an arithmetic number, because the mean of its divisors is an integer number (17888449656).

Almost surely, 2^204421423420 is an apocalyptic number.

204421423420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204421423420 is an abundant number, since it is smaller than the sum of its proper divisors (224901368324).

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

204421423420 is a wasteful number, since it uses less digits than its factorization.

204421423420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900069 (or 900067 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 204421423420 its reverse (24324124402), we get a palindrome (228745547822).

The spelling of 204421423420 in words is "two hundred four billion, four hundred twenty-one million, four hundred twenty-three thousand, four hundred twenty".