243240443020 has 48 divisors (see below), whose sum is σ = 537790629600. Its totient is φ = 92157972480.

The previous prime is 243240443003. The next prime is 243240443059. The reversal of 243240443020 is 20344042342.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 243240443020.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2058750 + ... + 2173690.

It is an arithmetic number, because the mean of its divisors is an integer number (11203971450).

Almost surely, 2^243240443020 is an apocalyptic number.

243240443020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243240443020 is an abundant number, since it is smaller than the sum of its proper divisors (294550186580).

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

243240443020 is a wasteful number, since it uses less digits than its factorization.

243240443020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120538 (or 120536 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 243240443020 its reverse (20344042342), we get a palindrome (263584485362).

The spelling of 243240443020 in words is "two hundred forty-three billion, two hundred forty million, four hundred forty-three thousand, twenty".