20266712543 has 16 divisors (see below), whose sum is σ = 25281302784. Its totient is φ = 15783672960.

The previous prime is 20266712491. The next prime is 20266712569. The reversal of 20266712543 is 34521766202.

It is not a de Polignac number, because 20266712543 - 2⁸ = 20266712287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20266712497 and 20266712506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20266712573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73271 + ... + 214247.

It is an arithmetic number, because the mean of its divisors is an integer number (1580081424).

Almost surely, 2^20266712543 is an apocalyptic number.

20266712543 is a deficient number, since it is larger than the sum of its proper divisors (5014590241).

20266712543 is a wasteful number, since it uses less digits than its factorization.

20266712543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142862.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 20266712543 in words is "twenty billion, two hundred sixty-six million, seven hundred twelve thousand, five hundred forty-three".