204020220 has 96 divisors (see below), whose sum is σ = 607118400. Its totient is φ = 51093504.

The previous prime is 204020153. The next prime is 204020261. The reversal of 204020220 is 22020402.

It is a happy number.

204020220 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 204020196 and 204020205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62796 + ... + 65964.

It is an arithmetic number, because the mean of its divisors is an integer number (6324150).

Almost surely, 2^204020220 is an apocalyptic number.

204020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204020220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303559200).

204020220 is an abundant number, since it is smaller than the sum of its proper divisors (403098180).

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

204020220 is a wasteful number, since it uses less digits than its factorization.

204020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247 (or 3245 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 204020220 is about 14283.5646811291. The cubic root of 204020220 is about 588.6959804567.

Adding to 204020220 its reverse (22020402), we get a palindrome (226040622).

The spelling of 204020220 in words is "two hundred four million, twenty thousand, two hundred twenty".