20384317 has 2 divisors, whose sum is σ = 20384318. Its totient is φ = 20384316.

The previous prime is 20384297. The next prime is 20384333. The reversal of 20384317 is 71348302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20259001 + 125316 = 4501^2 + 354^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20384317 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 (20384347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10192158 + 10192159.

It is an arithmetic number, because the mean of its divisors is an integer number (10192159).

Almost surely, 2^20384317 is an apocalyptic number.

It is an amenable number.

20384317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20384317 is an equidigital number, since it uses as much as digits as its factorization.

20384317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20384317 is about 4514.8994451704. The cubic root of 20384317 is about 273.1694038194.

The spelling of 20384317 in words is "twenty million, three hundred eighty-four thousand, three hundred seventeen".