21563716113 has 24 divisors (see below), whose sum is σ = 34715584800. Its totient is φ = 12818058624.

The previous prime is 21563716091. The next prime is 21563716121. The reversal of 21563716113 is 31161736512.

21563716113 is a `hidden beast` number, since 2 + 1 + 5 + 6 + 37 + 1 + 611 + 3 = 666.

It is not a de Polignac number, because 21563716113 - 2⁸ = 21563715857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21563712113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3706023 + ... + 3711836.

It is an arithmetic number, because the mean of its divisors is an integer number (1446482700).

Almost surely, 2^21563716113 is an apocalyptic number.

It is an amenable number.

21563716113 is a deficient number, since it is larger than the sum of its proper divisors (13151868687).

21563716113 is a wasteful number, since it uses less digits than its factorization.

21563716113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7417901 (or 7417898 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The spelling of 21563716113 in words is "twenty-one billion, five hundred sixty-three million, seven hundred sixteen thousand, one hundred thirteen".