20795717 has 2 divisors, whose sum is σ = 20795718. Its totient is φ = 20795716.

The previous prime is 20795707. The next prime is 20795759. The reversal of 20795717 is 71759702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20784481 + 11236 = 4559^2 + 106^2 .

It is a cyclic number.

It is not a de Polignac number, because 20795717 - 2¹² = 20791621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20795707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10397858 + 10397859.

It is an arithmetic number, because the mean of its divisors is an integer number (10397859).

Almost surely, 2^20795717 is an apocalyptic number.

It is an amenable number.

20795717 is a deficient number, since it is larger than the sum of its proper divisors (1).

20795717 is an equidigital number, since it uses as much as digits as its factorization.

20795717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30870, while the sum is 38.

The square root of 20795717 is about 4560.2321212851. The cubic root of 20795717 is about 274.9948957730.

It can be divided in two parts, 20795 and 717, that added together give a palindrome (21512).

The spelling of 20795717 in words is "twenty million, seven hundred ninety-five thousand, seven hundred seventeen".