204021430220 has 24 divisors (see below), whose sum is σ = 428554828464. Its totient is φ = 81587653056.

The previous prime is 204021430213. The next prime is 204021430231. The reversal of 204021430220 is 22034120402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 204021430192 and 204021430201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1227347 + ... + 1383626.

It is an arithmetic number, because the mean of its divisors is an integer number (17856451186).

Almost surely, 2^204021430220 is an apocalyptic number.

204021430220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204021430220 is an abundant number, since it is smaller than the sum of its proper divisors (224533398244).

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

204021430220 is a wasteful number, since it uses less digits than its factorization.

204021430220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614889 (or 2614887 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 204021430220 its reverse (22034120402), we get a palindrome (226055550622).

The spelling of 204021430220 in words is "two hundred four billion, twenty-one million, four hundred thirty thousand, two hundred twenty".