21104113444424 has 16 divisors (see below), whose sum is σ = 39570261439020. Its totient is φ = 10552043727360.

The previous prime is 21104113444331. The next prime is 21104113444439. The reversal of 21104113444424 is 42444431140112.

It can be written as a sum of positive squares in 2 ways, for example, as 20800148675524 + 303964768900 = 4560718^2 + 551330^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11988572 + ... + 13635764.

Almost surely, 2^{21104113444424} is an apocalyptic number.

It is an amenable number.

21104113444424 is a deficient number, since it is larger than the sum of its proper divisors (18466147994596).

21104113444424 is a wasteful number, since it uses less digits than its factorization.

21104113444424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3248720 (or 3248716 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 35.

Adding to 21104113444424 its reverse (42444431140112), we get a palindrome (63548544584536).

The spelling of 21104113444424 in words is "twenty-one trillion, one hundred four billion, one hundred thirteen million, four hundred forty-four thousand, four hundred twenty-four".