21316513348269 has 6 divisors (see below), whose sum is σ = 30790519280846. Its totient is φ = 14211008898840.

The previous prime is 21316513348253. The next prime is 21316513348303. The reversal of 21316513348269 is 96284331561312.

21316513348269 is a `hidden beast` number, since 2 + 1 + 3 + 16 + 513 + 34 + 82 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21257973545769 + 58539802500 = 4610637^2 + 241950^2 .

It is not a de Polignac number, because 21316513348269 - 2⁴ = 21316513348253 is a prime.

It is a super-2 number, since 2×21316513348269² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21316513348769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1184250741562 + ... + 1184250741579.

Almost surely, 2^{21316513348269} is an apocalyptic number.

It is an amenable number.

21316513348269 is a deficient number, since it is larger than the sum of its proper divisors (9474005932577).

21316513348269 is a wasteful number, since it uses less digits than its factorization.

21316513348269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368501483147 (or 2368501483144 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The spelling of 21316513348269 in words is "twenty-one trillion, three hundred sixteen billion, five hundred thirteen million, three hundred forty-eight thousand, two hundred sixty-nine".