21313960713 has 6 divisors (see below), whose sum is σ = 30786832154. Its totient is φ = 14209307136.

The previous prime is 21313960699. The next prime is 21313960721. The reversal of 21313960713 is 31706931312.

21313960713 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 39 + 607 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12295039689 + 9018921024 = 110883^2 + 94968^2 .

It is not a de Polignac number, because 21313960713 - 2¹² = 21313956617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21313960753) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1184108920 + ... + 1184108937.

Almost surely, 2^21313960713 is an apocalyptic number.

It is an amenable number.

21313960713 is a deficient number, since it is larger than the sum of its proper divisors (9472871441).

21313960713 is a wasteful number, since it uses less digits than its factorization.

21313960713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368217863 (or 2368217860 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The spelling of 21313960713 in words is "twenty-one billion, three hundred thirteen million, nine hundred sixty thousand, seven hundred thirteen".