21050527744 has 39 divisors (see below), whose sum is σ = 42114493387. Its totient is φ = 10520621056.

The previous prime is 21050527741. The next prime is 21050527753. The reversal of 21050527744 is 44772505012.

The square root of 21050527744 is 145088.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21050527741) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 9284499 + ... + 9286765.

Almost surely, 2^21050527744 is an apocalyptic number.

21050527744 is the 145088-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21050527744

21050527744 is an abundant number, since it is smaller than the sum of its proper divisors (21063965643).

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

21050527744 is an frugal number, since it uses more digits than its factorization.

21050527744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4558 (or 2269 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 37.

The spelling of 21050527744 in words is "twenty-one billion, fifty million, five hundred twenty-seven thousand, seven hundred forty-four".