20268317 has 2 divisors, whose sum is σ = 20268318. Its totient is φ = 20268316.

The previous prime is 20268293. The next prime is 20268323. The reversal of 20268317 is 71386202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10621081 + 9647236 = 3259^2 + 3106^2 .

It is a cyclic number.

It is not a de Polignac number, because 20268317 - 2⁶ = 20268253 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20268317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20268397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10134158 + 10134159.

It is an arithmetic number, because the mean of its divisors is an integer number (10134159).

Almost surely, 2^20268317 is an apocalyptic number.

It is an amenable number.

20268317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20268317 is an equidigital number, since it uses as much as digits as its factorization.

20268317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20268317 is about 4502.0347621936. The cubic root of 20268317 is about 272.6502473625.

The spelling of 20268317 in words is "twenty million, two hundred sixty-eight thousand, three hundred seventeen".