20053717 has 2 divisors, whose sum is σ = 20053718. Its totient is φ = 20053716.

The previous prime is 20053699. The next prime is 20053763. The reversal of 20053717 is 71735002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18096516 + 1957201 = 4254^2 + 1399^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20053717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20053691 and 20053700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20057717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10026858 + 10026859.

It is an arithmetic number, because the mean of its divisors is an integer number (10026859).

Almost surely, 2^20053717 is an apocalyptic number.

It is an amenable number.

20053717 is a deficient number, since it is larger than the sum of its proper divisors (1).

20053717 is an equidigital number, since it uses as much as digits as its factorization.

20053717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 20053717 is about 4478.1376709521. The cubic root of 20053717 is about 271.6845616994.

Adding to 20053717 its reverse (71735002), we get a palindrome (91788719).

The spelling of 20053717 in words is "twenty million, fifty-three thousand, seven hundred seventeen".