204343111220 has 24 divisors (see below), whose sum is σ = 443917794600. Its totient is φ = 78918718592.

The previous prime is 204343111201. The next prime is 204343111223. The reversal of 204343111220 is 22111343402.

It can be written as a sum of positive squares in 4 ways, for example, as 89620001956 + 114723109264 = 299366^2 + 338708^2 .

It is a super-2 number, since 2×204343111220² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204343111223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176157275 + ... + 176158434.

It is an arithmetic number, because the mean of its divisors is an integer number (18496574775).

Almost surely, 2^204343111220 is an apocalyptic number.

204343111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204343111220 is an abundant number, since it is smaller than the sum of its proper divisors (239574683380).

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

204343111220 is a wasteful number, since it uses less digits than its factorization.

204343111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352315747 (or 352315745 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 204343111220 its reverse (22111343402), we get a palindrome (226454454622).

The spelling of 204343111220 in words is "two hundred four billion, three hundred forty-three million, one hundred eleven thousand, two hundred twenty".