20287417 has 2 divisors, whose sum is σ = 20287418. Its totient is φ = 20287416.

The previous prime is 20287411. The next prime is 20287429. The reversal of 20287417 is 71478202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20169081 + 118336 = 4491^2 + 344^2 .

It is a cyclic number.

It is not a de Polignac number, because 20287417 - 2¹⁵ = 20254649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20287411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10143708 + 10143709.

It is an arithmetic number, because the mean of its divisors is an integer number (10143709).

Almost surely, 2^20287417 is an apocalyptic number.

It is an amenable number.

20287417 is a deficient number, since it is larger than the sum of its proper divisors (1).

20287417 is an equidigital number, since it uses as much as digits as its factorization.

20287417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 20287417 is about 4504.1555257340. The cubic root of 20287417 is about 272.7358651401.

The spelling of 20287417 in words is "twenty million, two hundred eighty-seven thousand, four hundred seventeen".