20544705776443 has 4 divisors (see below), whose sum is σ = 20548279396000. Its totient is φ = 20541132156888.

The previous prime is 20544705776417. The next prime is 20544705776461. The reversal of 20544705776443 is 34467750744502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20544705776443 - 2⁹ = 20544705775931 is a prime.

It is a super-2 number, since 2×20544705776443² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20544705770443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1786801155 + ... + 1786812652.

It is an arithmetic number, because the mean of its divisors is an integer number (5137069849000).

Almost surely, 2^{20544705776443} is an apocalyptic number.

20544705776443 is a deficient number, since it is larger than the sum of its proper divisors (3573619557).

20544705776443 is an equidigital number, since it uses as much as digits as its factorization.

20544705776443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3573619556.

The product of its (nonzero) digits is 79027200, while the sum is 58.

The spelling of 20544705776443 in words is "twenty trillion, five hundred forty-four billion, seven hundred five million, seven hundred seventy-six thousand, four hundred forty-three".