21744122426471 has 4 divisors (see below), whose sum is σ = 21744133686744. Its totient is φ = 21744111166200.

The previous prime is 21744122426399. The next prime is 21744122426473. The reversal of 21744122426471 is 17462422144712.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21744122426471 - 2⁴² = 17346075915367 is a prime.

It is a super-3 number, since 3×21744122426471³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21744122426473) 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, 1917500 + ... + 6867681.

It is an arithmetic number, because the mean of its divisors is an integer number (5436033421686).

Almost surely, 2^{21744122426471} is an apocalyptic number.

21744122426471 is a deficient number, since it is larger than the sum of its proper divisors (11260273).

21744122426471 is an equidigital number, since it uses as much as digits as its factorization.

21744122426471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11260272.

The product of its digits is 1204224, while the sum is 47.

The spelling of 21744122426471 in words is "twenty-one trillion, seven hundred forty-four billion, one hundred twenty-two million, four hundred twenty-six thousand, four hundred seventy-one".