21713867512 has 16 divisors (see below), whose sum is σ = 40759938360. Its totient is φ = 10844550624.

The previous prime is 21713867473. The next prime is 21713867533. The reversal of 21713867512 is 21576831712.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1540438 + ... + 1554469.

Almost surely, 2^21713867512 is an apocalyptic number.

It is an amenable number.

21713867512 is a deficient number, since it is larger than the sum of its proper divisors (19046070848).

21713867512 is a wasteful number, since it uses less digits than its factorization.

21713867512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095790 (or 3095786 counting only the distinct ones).

The product of its digits is 141120, while the sum is 43.

It can be divided in two parts, 2171 and 3867512, that added together give a palindrome (3869683).

The spelling of 21713867512 in words is "twenty-one billion, seven hundred thirteen million, eight hundred sixty-seven thousand, five hundred twelve".