20424510005543 has 64 divisors (see below), whose sum is σ = 25425290016000. Its totient is φ = 16370358036480.

The previous prime is 20424510005479. The next prime is 20424510005579. The reversal of 20424510005543 is 34550001542402.

It is not a de Polignac number, because 20424510005543 - 2⁶ = 20424510005479 is a prime.

It is a super-2 number, since 2×20424510005543² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424510905543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55689521 + ... + 56055077.

It is an arithmetic number, because the mean of its divisors is an integer number (397270156500).

Almost surely, 2^{20424510005543} is an apocalyptic number.

20424510005543 is a deficient number, since it is larger than the sum of its proper divisors (5000780010457).

20424510005543 is a wasteful number, since it uses less digits than its factorization.

20424510005543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365785 (or 365771 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 20424510005543 its reverse (34550001542402), we get a palindrome (54974511547945).

The spelling of 20424510005543 in words is "twenty trillion, four hundred twenty-four billion, five hundred ten million, five thousand, five hundred forty-three".