20086498917 has 6 divisors (see below), whose sum is σ = 29013831782. Its totient is φ = 13390999272.

The previous prime is 20086498879. The next prime is 20086498933. The reversal of 20086498917 is 71989468002.

It can be written as a sum of positive squares in only one way, i.e., 15013355841 + 5073143076 = 122529^2 + 71226^2 .

It is not a de Polignac number, because 20086498917 - 2⁸ = 20086498661 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 (20086498967) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1115916598 + ... + 1115916615.

Almost surely, 2^20086498917 is an apocalyptic number.

It is an amenable number.

20086498917 is a deficient number, since it is larger than the sum of its proper divisors (8927332865).

20086498917 is a wasteful number, since it uses less digits than its factorization.

20086498917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231833219 (or 2231833216 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 20086498917 in words is "twenty billion, eighty-six million, four hundred ninety-eight thousand, nine hundred seventeen".