13006500021 has 16 divisors (see below), whose sum is σ = 19678867200. Its totient is φ = 8486509824.

The previous prime is 13006499983. The next prime is 13006500041. The reversal of 13006500021 is 12000560031.

13006500021 is a `hidden beast` number, since 13 + 0 + 0 + 650 + 0 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 13006500021 - 2⁹ = 13006499509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13006499967 and 13006500003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13006500041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5123436 + ... + 5125973.

It is an arithmetic number, because the mean of its divisors is an integer number (1229929200).

Almost surely, 2^13006500021 is an apocalyptic number.

It is an amenable number.

13006500021 is a deficient number, since it is larger than the sum of its proper divisors (6672367179).

13006500021 is a wasteful number, since it uses less digits than its factorization.

13006500021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10249465 (or 10249459 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The spelling of 13006500021 in words is "thirteen billion, six million, five hundred thousand, twenty-one".