243305452420 has 24 divisors (see below), whose sum is σ = 510974773848. Its totient is φ = 97315833600.

The previous prime is 243305452409. The next prime is 243305452427. The reversal of 243305452420 is 24254503342.

It can be written as a sum of positive squares in 4 ways, for example, as 81471426624 + 161834025796 = 285432^2 + 402286^2 .

It is not an unprimeable number, because it can be changed into a prime (243305452427) 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, 76071 + ... + 701710.

It is an arithmetic number, because the mean of its divisors is an integer number (21290615577).

Almost surely, 2^243305452420 is an apocalyptic number.

243305452420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243305452420 is an abundant number, since it is smaller than the sum of its proper divisors (267669321428).

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

243305452420 is a wasteful number, since it uses less digits than its factorization.

243305452420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793431 (or 793429 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 34.

Adding to 243305452420 its reverse (24254503342), we get a palindrome (267559955762).

The spelling of 243305452420 in words is "two hundred forty-three billion, three hundred five million, four hundred fifty-two thousand, four hundred twenty".