243204020 has 12 divisors (see below), whose sum is σ = 510728484. Its totient is φ = 97281600.

The previous prime is 243203999. The next prime is 243204043. The reversal of 243204020 is 20402342.

It can be written as a sum of positive squares in 2 ways, for example, as 114789796 + 128414224 = 10714^2 + 11332^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 243204020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6080081 + ... + 6080120.

It is an arithmetic number, because the mean of its divisors is an integer number (42560707).

Almost surely, 2^243204020 is an apocalyptic number.

243204020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243204020 is an abundant number, since it is smaller than the sum of its proper divisors (267524464).

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

243204020 is a wasteful number, since it uses less digits than its factorization.

243204020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12160210 (or 12160208 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 243204020 is about 15594.9998396922. Note that the first 3 decimals coincide. The cubic root of 243204020 is about 624.1997395037.

Adding to 243204020 its reverse (20402342), we get a palindrome (263606362).

The spelling of 243204020 in words is "two hundred forty-three million, two hundred four thousand, twenty".