20513002651317 has 48 divisors (see below), whose sum is σ = 33127377506496. Its totient is φ = 12123230112000.

The previous prime is 20513002651313. The next prime is 20513002651321. The reversal of 20513002651317 is 71315620031502.

20513002651317 is a `hidden beast` number, since 2 + 0 + 5 + 130 + 0 + 2 + 6 + 513 + 1 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (20513002651313) and next prime (20513002651321).

It is not a de Polignac number, because 20513002651317 - 2² = 20513002651313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20513002651313) 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 47 ways as a sum of consecutive naturals, for example, 7510098 + ... + 9870540.

It is an arithmetic number, because the mean of its divisors is an integer number (690153698052).

Almost surely, 2^{20513002651317} is an apocalyptic number.

It is an amenable number.

20513002651317 is a deficient number, since it is larger than the sum of its proper divisors (12614374855179).

20513002651317 is a wasteful number, since it uses less digits than its factorization.

20513002651317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362642 (or 2362639 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

Adding to 20513002651317 its reverse (71315620031502), we get a palindrome (91828622682819).

The spelling of 20513002651317 in words is "twenty trillion, five hundred thirteen billion, two million, six hundred fifty-one thousand, three hundred seventeen".