20098917 has 6 divisors (see below), whose sum is σ = 29031782. Its totient is φ = 13399272.

The previous prime is 20098909. The next prime is 20098927. The reversal of 20098917 is 71989002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13793796 + 6305121 = 3714^2 + 2511^2 .

It is not a de Polignac number, because 20098917 - 2³ = 20098909 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 (20098907) 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, 1116598 + ... + 1116615.

Almost surely, 2^20098917 is an apocalyptic number.

It is an amenable number.

20098917 is a deficient number, since it is larger than the sum of its proper divisors (8932865).

20098917 is a wasteful number, since it uses less digits than its factorization.

20098917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233219 (or 2233216 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 20098917 is about 4483.1815711613. The cubic root of 20098917 is about 271.8885293307. Note that the first 3 decimals are identical.

The spelling of 20098917 in words is "twenty million, ninety-eight thousand, nine hundred seventeen".