20775383 has 2 divisors, whose sum is σ = 20775384. Its totient is φ = 20775382.

The previous prime is 20775331. The next prime is 20775413. The reversal of 20775383 is 38357702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20775383 - 2⁸ = 20775127 is a prime.

It is a Sophie Germain 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 (20775583) 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, 10387691 + 10387692.

It is an arithmetic number, because the mean of its divisors is an integer number (10387692).

Almost surely, 2^20775383 is an apocalyptic number.

20775383 is a deficient number, since it is larger than the sum of its proper divisors (1).

20775383 is an equidigital number, since it uses as much as digits as its factorization.

20775383 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 20775383 is about 4558.0020842470. The cubic root of 20775383 is about 274.9052367704.

The spelling of 20775383 in words is "twenty million, seven hundred seventy-five thousand, three hundred eighty-three".