204143220 has 192 divisors, whose sum is σ = 678585600. Its totient is φ = 50803200.

The previous prime is 204143197. The next prime is 204143221. The reversal of 204143220 is 22341402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 204143193 and 204143202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204143221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1036162 + ... + 1036358.

It is an arithmetic number, because the mean of its divisors is an integer number (3534300).

Almost surely, 2^204143220 is an apocalyptic number.

204143220 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 204143220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339292800).

204143220 is an abundant number, since it is smaller than the sum of its proper divisors (474442380).

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

204143220 is a wasteful number, since it uses less digits than its factorization.

204143220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 204143220 is about 14287.8696802567. The cubic root of 204143220 is about 588.8142613130.

Adding to 204143220 its reverse (22341402), we get a palindrome (226484622).

The spelling of 204143220 in words is "two hundred four million, one hundred forty-three thousand, two hundred twenty".