21992568716 has 12 divisors (see below), whose sum is σ = 38564127000. Its totient is φ = 10974246720.

The previous prime is 21992568667. The next prime is 21992568727. The reversal of 21992568716 is 61786529912.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5507165 + ... + 5511156.

It is an arithmetic number, because the mean of its divisors is an integer number (3213677250).

Almost surely, 2^21992568716 is an apocalyptic number.

It is an amenable number.

21992568716 is a deficient number, since it is larger than the sum of its proper divisors (16571558284).

21992568716 is a wasteful number, since it uses less digits than its factorization.

21992568716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11018824 (or 11018822 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 56.

The spelling of 21992568716 in words is "twenty-one billion, nine hundred ninety-two million, five hundred sixty-eight thousand, seven hundred sixteen".