21413586724 has 12 divisors (see below), whose sum is σ = 38033087344. Its totient is φ = 10546990344.

The previous prime is 21413586721. The next prime is 21413586731. The reversal of 21413586724 is 42768531412.

It is not an unprimeable number, because it can be changed into a prime (21413586721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39950454 + ... + 39950989.

Almost surely, 2^21413586724 is an apocalyptic number.

It is an amenable number.

21413586724 is a deficient number, since it is larger than the sum of its proper divisors (16619500620).

21413586724 is a wasteful number, since it uses less digits than its factorization.

21413586724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79901514 (or 79901512 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The spelling of 21413586724 in words is "twenty-one billion, four hundred thirteen million, five hundred eighty-six thousand, seven hundred twenty-four".