20566244543 has 8 divisors (see below), whose sum is σ = 22264225536. Its totient is φ = 18884829600.

The previous prime is 20566244527. The next prime is 20566244549. The reversal of 20566244543 is 34544266502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20566244543 - 2⁴ = 20566244527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20566244543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20566244549) 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, 4138928 + ... + 4143893.

It is an arithmetic number, because the mean of its divisors is an integer number (2783028192).

Almost surely, 2^20566244543 is an apocalyptic number.

20566244543 is a deficient number, since it is larger than the sum of its proper divisors (1697980993).

20566244543 is a wasteful number, since it uses less digits than its factorization.

20566244543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8283025.

The product of its (nonzero) digits is 691200, while the sum is 41.

The spelling of 20566244543 in words is "twenty billion, five hundred sixty-six million, two hundred forty-four thousand, five hundred forty-three".