21726704525243 has 16 divisors (see below), whose sum is σ = 22957082661600. Its totient is φ = 20530379251200.

The previous prime is 21726704525221. The next prime is 21726704525249. The reversal of 21726704525243 is 34252540762712.

It is a cyclic number.

It is not a de Polignac number, because 21726704525243 - 2¹⁰ = 21726704524219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21726704525191 and 21726704525200.

It is not an unprimeable number, because it can be changed into a prime (21726704525249) 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 15 ways as a sum of consecutive naturals, for example, 17009333 + ... + 18242006.

It is an arithmetic number, because the mean of its divisors is an integer number (1434817666350).

Almost surely, 2^{21726704525243} is an apocalyptic number.

21726704525243 is a deficient number, since it is larger than the sum of its proper divisors (1230378136357).

21726704525243 is a wasteful number, since it uses less digits than its factorization.

21726704525243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35251822.

The product of its (nonzero) digits is 5644800, while the sum is 50.

The spelling of 21726704525243 in words is "twenty-one trillion, seven hundred twenty-six billion, seven hundred four million, five hundred twenty-five thousand, two hundred forty-three".