21710565344 has 48 divisors (see below), whose sum is σ = 47153307600. Its totient is φ = 9775856640.

The previous prime is 21710565341. The next prime is 21710565379. The reversal of 21710565344 is 44356501712.

It is a junction number, because it is equal to n+sod(n) for n = 21710565298 and 21710565307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21710565341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619394 + ... + 653505.

It is an arithmetic number, because the mean of its divisors is an integer number (982360575).

Almost surely, 2^21710565344 is an apocalyptic number.

It is an amenable number.

21710565344 is an abundant number, since it is smaller than the sum of its proper divisors (25442742256).

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

21710565344 is a wasteful number, since it uses less digits than its factorization.

21710565344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272963 (or 1272955 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 21710565344 in words is "twenty-one billion, seven hundred ten million, five hundred sixty-five thousand, three hundred forty-four".