20005102617 has 16 divisors (see below), whose sum is σ = 26884630080. Its totient is φ = 13231212800.

The previous prime is 20005102609. The next prime is 20005102619. The reversal of 20005102617 is 71620150002.

It is a cyclic number.

It is not a de Polignac number, because 20005102617 - 2³ = 20005102609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20005102619) 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, 2653309 + ... + 2660837.

It is an arithmetic number, because the mean of its divisors is an integer number (1680289380).

Almost surely, 2^20005102617 is an apocalyptic number.

It is an amenable number.

20005102617 is a deficient number, since it is larger than the sum of its proper divisors (6879527463).

20005102617 is a wasteful number, since it uses less digits than its factorization.

20005102617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14424.

The product of its (nonzero) digits is 840, while the sum is 24.

Adding to 20005102617 its reverse (71620150002), we get a palindrome (91625252619).

The spelling of 20005102617 in words is "twenty billion, five million, one hundred two thousand, six hundred seventeen".