20382917 has 2 divisors, whose sum is σ = 20382918. Its totient is φ = 20382916.

The previous prime is 20382889. The next prime is 20382919. The reversal of 20382917 is 71928302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17048641 + 3334276 = 4129^2 + 1826^2 .

It is a cyclic number.

It is not a de Polignac number, because 20382917 - 2¹² = 20378821 is a prime.

Together with 20382919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20382919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10191458 + 10191459.

It is an arithmetic number, because the mean of its divisors is an integer number (10191459).

Almost surely, 2^20382917 is an apocalyptic number.

It is an amenable number.

20382917 is a deficient number, since it is larger than the sum of its proper divisors (1).

20382917 is an equidigital number, since it uses as much as digits as its factorization.

20382917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 20382917 is about 4514.7444002955. The cubic root of 20382917 is about 273.1631498951.

The spelling of 20382917 in words is "twenty million, three hundred eighty-two thousand, nine hundred seventeen".