20126324242543 has 4 divisors (see below), whose sum is σ = 20126590704928. Its totient is φ = 20126057780160.

The previous prime is 20126324242537. The next prime is 20126324242571. The reversal of 20126324242543 is 34524242362102.

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 20126324242543 - 2⁵ = 20126324242511 is a prime.

It is a super-2 number, since 2×20126324242543² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20126324242496 and 20126324242505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20126324242523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133117863 + ... + 133268968.

It is an arithmetic number, because the mean of its divisors is an integer number (5031647676232).

Almost surely, 2^{20126324242543} is an apocalyptic number.

20126324242543 is a deficient number, since it is larger than the sum of its proper divisors (266462385).

20126324242543 is an equidigital number, since it uses as much as digits as its factorization.

20126324242543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266462384.

The product of its (nonzero) digits is 552960, while the sum is 40.

The spelling of 20126324242543 in words is "twenty trillion, one hundred twenty-six billion, three hundred twenty-four million, two hundred forty-two thousand, five hundred forty-three".