21724025126043 has 32 divisors (see below), whose sum is σ = 29079887496192. Its totient is φ = 14425554528000.

The previous prime is 21724025126009. The next prime is 21724025126059. The reversal of 21724025126043 is 34062152042712.

It is not a de Polignac number, because 21724025126043 - 2⁴² = 17325978614939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21724025125992 and 21724025126010.

It is not an unprimeable number, because it can be changed into a prime (21724025126093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3241904593 + ... + 3241911293.

It is an arithmetic number, because the mean of its divisors is an integer number (908746484256).

Almost surely, 2^{21724025126043} is an apocalyptic number.

21724025126043 is a deficient number, since it is larger than the sum of its proper divisors (7355862370149).

21724025126043 is a wasteful number, since it uses less digits than its factorization.

21724025126043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10995.

The product of its (nonzero) digits is 161280, while the sum is 39.

Adding to 21724025126043 its reverse (34062152042712), we get a palindrome (55786177168755).

The spelling of 21724025126043 in words is "twenty-one trillion, seven hundred twenty-four billion, twenty-five million, one hundred twenty-six thousand, forty-three".