20065517 has 8 divisors (see below), whose sum is σ = 20374200. Its totient is φ = 19759104.

The previous prime is 20065489. The next prime is 20065531. The reversal of 20065517 is 71556002.

It can be written as a sum of positive squares in 4 ways, for example, as 48841 + 20016676 = 221^2 + 4474^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20065517 - 2¹⁰ = 20064493 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 (20065537) 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 7 ways as a sum of consecutive naturals, for example, 25709 + ... + 26477.

It is an arithmetic number, because the mean of its divisors is an integer number (2546775).

Almost surely, 2^20065517 is an apocalyptic number.

It is an amenable number.

20065517 is a deficient number, since it is larger than the sum of its proper divisors (308683).

20065517 is an equidigital number, since it uses as much as digits as its factorization.

20065517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 20065517 is about 4479.4549891700. The cubic root of 20065517 is about 271.7378394240.

The spelling of 20065517 in words is "twenty million, sixty-five thousand, five hundred seventeen".