21314906613 has 72 divisors (see below), whose sum is σ = 41651361024. Its totient is φ = 10220886720.

The previous prime is 21314906581. The next prime is 21314906617. The reversal of 21314906613 is 31660941312.

21314906613 is a `hidden beast` number, since 2 + 1 + 31 + 4 + 9 + 0 + 6 + 613 = 666.

It is not a de Polignac number, because 21314906613 - 2⁵ = 21314906581 is a prime.

It is a super-2 number, since 2×21314906613² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314906617) 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 71 ways as a sum of consecutive naturals, for example, 8445 + ... + 206642.

Almost surely, 2^21314906613 is an apocalyptic number.

It is an amenable number.

21314906613 is a deficient number, since it is larger than the sum of its proper divisors (20336454411).

21314906613 is a wasteful number, since it uses less digits than its factorization.

21314906613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215135 (or 215121 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 21314906613 in words is "twenty-one billion, three hundred fourteen million, nine hundred six thousand, six hundred thirteen".