20012917 has 2 divisors, whose sum is σ = 20012918. Its totient is φ = 20012916.

The previous prime is 20012903. The next prime is 20012933. The reversal of 20012917 is 71921002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19000881 + 1012036 = 4359^2 + 1006^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012917 - 2¹⁹ = 19488629 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20010917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006458 + 10006459.

It is an arithmetic number, because the mean of its divisors is an integer number (10006459).

Almost surely, 2^20012917 is an apocalyptic number.

It is an amenable number.

20012917 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012917 is an equidigital number, since it uses as much as digits as its factorization.

20012917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 20012917 is about 4473.5798863997. The cubic root of 20012917 is about 271.5001859708.

Adding to 20012917 its reverse (71921002), we get a palindrome (91933919).

The spelling of 20012917 in words is "twenty million, twelve thousand, nine hundred seventeen".