20680017 has 16 divisors (see below), whose sum is σ = 28366848. Its totient is φ = 13395200.

The previous prime is 20680001. The next prime is 20680021. The reversal of 20680017 is 71008602.

It is a cyclic number.

It is not a de Polignac number, because 20680017 - 2⁴ = 20680001 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20680027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17392 + ... + 18542.

It is an arithmetic number, because the mean of its divisors is an integer number (1772928).

Almost surely, 2^20680017 is an apocalyptic number.

It is an amenable number.

20680017 is a deficient number, since it is larger than the sum of its proper divisors (7686831).

20680017 is a wasteful number, since it uses less digits than its factorization.

20680017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 20680017 is about 4547.5286695083. The cubic root of 20680017 is about 274.4839556516.

Adding to 20680017 its reverse (71008602), we get a palindrome (91688619).

The spelling of 20680017 in words is "twenty million, six hundred eighty thousand, seventeen".