21744420445 has 8 divisors (see below), whose sum is σ = 28465423200. Its totient is φ = 15814123920.

The previous prime is 21744420437. The next prime is 21744420461. The reversal of 21744420445 is 54402444712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21744420445 - 2³ = 21744420437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197676495 + ... + 197676604.

It is an arithmetic number, because the mean of its divisors is an integer number (3558177900).

Almost surely, 2^21744420445 is an apocalyptic number.

It is an amenable number.

21744420445 is a deficient number, since it is larger than the sum of its proper divisors (6721002755).

21744420445 is a wasteful number, since it uses less digits than its factorization.

21744420445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395353115.

The product of its (nonzero) digits is 143360, while the sum is 37.

The spelling of 21744420445 in words is "twenty-one billion, seven hundred forty-four million, four hundred twenty thousand, four hundred forty-five".