21752816496 has 20 divisors (see below), whose sum is σ = 56194776072. Its totient is φ = 7250938816.

The previous prime is 21752816473. The next prime is 21752816507. The reversal of 21752816496 is 69461825712.

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 3 ways as a sum of consecutive naturals, for example, 226591791 + ... + 226591886.

Almost surely, 2^21752816496 is an apocalyptic number.

It is an amenable number.

21752816496 is an abundant number, since it is smaller than the sum of its proper divisors (34441959576).

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

21752816496 is a wasteful number, since it uses less digits than its factorization.

21752816496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453183688 (or 453183682 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The spelling of 21752816496 in words is "twenty-one billion, seven hundred fifty-two million, eight hundred sixteen thousand, four hundred ninety-six".