21116423744328 has 128 divisors (see below), whose sum is σ = 58572214041600. Its totient is φ = 6289830508800.

The previous prime is 21116423744327. The next prime is 21116423744411. The reversal of 21116423744328 is 82344732461112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21116423744327) 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 31 ways as a sum of consecutive naturals, for example, 169108525 + ... + 169233347.

It is an arithmetic number, because the mean of its divisors is an integer number (457595422200).

Almost surely, 2^{21116423744328} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21116423744328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29286107020800).

21116423744328 is an abundant number, since it is smaller than the sum of its proper divisors (37455790297272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21116423744328 is a wasteful number, since it uses less digits than its factorization.

21116423744328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135763 (or 135759 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 48.

The spelling of 21116423744328 in words is "twenty-one trillion, one hundred sixteen billion, four hundred twenty-three million, seven hundred forty-four thousand, three hundred twenty-eight".