20543443230 has 16 divisors (see below), whose sum is σ = 49304263824. Its totient is φ = 5478251520.

The previous prime is 20543443213. The next prime is 20543443237. The reversal of 20543443230 is 3234434502.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 684781441 = 20543443230 / (2 + 0 + 5 + 4 + 3 + 4 + 4 + 3 + 2 + 3 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20543443237) 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, 342390691 + ... + 342390750.

It is an arithmetic number, because the mean of its divisors is an integer number (3081516489).

Almost surely, 2^20543443230 is an apocalyptic number.

20543443230 is an abundant number, since it is smaller than the sum of its proper divisors (28760820594).

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

20543443230 is a wasteful number, since it uses less digits than its factorization.

20543443230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684781451.

The product of its (nonzero) digits is 34560, while the sum is 30.

Adding to 20543443230 its reverse (3234434502), we get a palindrome (23777877732).

The spelling of 20543443230 in words is "twenty billion, five hundred forty-three million, four hundred forty-three thousand, two hundred thirty".