20000017 has 4 divisors (see below), whose sum is σ = 20540596. Its totient is φ = 19459440.

The previous prime is 20000003. The next prime is 20000023. The reversal of 20000017 is 71000002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11566801 + 8433216 = 3401^2 + 2904^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19999958 and 20000012.

It is not an unprimeable number, because it can be changed into a prime (20000047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270234 + ... + 270307.

It is an arithmetic number, because the mean of its divisors is an integer number (5135149).

Almost surely, 2^20000017 is an apocalyptic number.

It is an amenable number.

20000017 is a deficient number, since it is larger than the sum of its proper divisors (540579).

20000017 is an equidigital number, since it uses as much as digits as its factorization.

20000017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540578.

The product of its (nonzero) digits is 14, while the sum is 10.

The square root of 20000017 is about 4472.1378556570. The cubic root of 20000017 is about 271.4418385680.

Adding to 20000017 its reverse (71000002), we get a palindrome (91000019).

The spelling of 20000017 in words is "twenty million, seventeen", and thus it is an aban number and an uban number.