20613606517 has 16 divisors (see below), whose sum is σ = 23740300672. Its totient is φ = 17532910080.

The previous prime is 20613606511. The next prime is 20613606529. The reversal of 20613606517 is 71560631602.

It is not a de Polignac number, because 20613606517 - 2¹⁵ = 20613573749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20613606511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455833 + ... + 499009.

It is an arithmetic number, because the mean of its divisors is an integer number (1483768792).

Almost surely, 2^20613606517 is an apocalyptic number.

It is an amenable number.

20613606517 is a deficient number, since it is larger than the sum of its proper divisors (3126694155).

20613606517 is a wasteful number, since it uses less digits than its factorization.

20613606517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43708.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 20613606517 in words is "twenty billion, six hundred thirteen million, six hundred six thousand, five hundred seventeen".