20627317 has 2 divisors, whose sum is σ = 20627318. Its totient is φ = 20627316.

The previous prime is 20627311. The next prime is 20627329. The reversal of 20627317 is 71372602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13439556 + 7187761 = 3666^2 + 2681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20627317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20627311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10313658 + 10313659.

It is an arithmetic number, because the mean of its divisors is an integer number (10313659).

Almost surely, 2^20627317 is an apocalyptic number.

It is an amenable number.

20627317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20627317 is an equidigital number, since it uses as much as digits as its factorization.

20627317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 20627317 is about 4541.7306172868. The cubic root of 20627317 is about 274.2505965678.

Adding to 20627317 its reverse (71372602), we get a palindrome (91999919).

The spelling of 20627317 in words is "twenty million, six hundred twenty-seven thousand, three hundred seventeen".