21713926712 has 16 divisors (see below), whose sum is σ = 42856434600. Its totient is φ = 10285544160.

The previous prime is 21713926711. The next prime is 21713926739. The reversal of 21713926712 is 21762931712.

It is a happy number.

It is a super-2 number, since 2×21713926712² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21713926712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21713926711) 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 3 ways as a sum of consecutive naturals, for example, 71427239 + ... + 71427542.

Almost surely, 2^21713926712 is an apocalyptic number.

It is an amenable number.

21713926712 is a deficient number, since it is larger than the sum of its proper divisors (21142507888).

21713926712 is a wasteful number, since it uses less digits than its factorization.

21713926712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142854806 (or 142854802 counting only the distinct ones).

The product of its digits is 63504, while the sum is 41.

The spelling of 21713926712 in words is "twenty-one billion, seven hundred thirteen million, nine hundred twenty-six thousand, seven hundred twelve".