20417359 has 2 divisors, whose sum is σ = 20417360. Its totient is φ = 20417358.

The previous prime is 20417339. The next prime is 20417387. The reversal of 20417359 is 95371402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20417359 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 20417359.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20417329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10208679 + 10208680.

It is an arithmetic number, because the mean of its divisors is an integer number (10208680).

Almost surely, 2^20417359 is an apocalyptic number.

20417359 is a deficient number, since it is larger than the sum of its proper divisors (1).

20417359 is an equidigital number, since it uses as much as digits as its factorization.

20417359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 20417359 is about 4518.5571812250. The cubic root of 20417359 is about 273.3169223077.

The spelling of 20417359 in words is "twenty million, four hundred seventeen thousand, three hundred fifty-nine".