21713576571 has 12 divisors (see below), whose sum is σ = 32093452248. Its totient is φ = 14139072864.

The previous prime is 21713576513. The next prime is 21713576593. The reversal of 21713576571 is 17567531712.

21713576571 is a `hidden beast` number, since 2 + 1 + 7 + 1 + 3 + 5 + 76 + 571 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-21713576571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21713576471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28053330 + ... + 28054103.

It is an arithmetic number, because the mean of its divisors is an integer number (2674454354).

Almost surely, 2^21713576571 is an apocalyptic number.

21713576571 is a deficient number, since it is larger than the sum of its proper divisors (10379875677).

21713576571 is a wasteful number, since it uses less digits than its factorization.

21713576571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56107482 (or 56107479 counting only the distinct ones).

The product of its digits is 308700, while the sum is 45.

The spelling of 21713576571 in words is "twenty-one billion, seven hundred thirteen million, five hundred seventy-six thousand, five hundred seventy-one".