20475683 has 2 divisors, whose sum is σ = 20475684. Its totient is φ = 20475682.

The previous prime is 20475677. The next prime is 20475709. The reversal of 20475683 is 38657402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20475683 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20475613) 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, 10237841 + 10237842.

It is an arithmetic number, because the mean of its divisors is an integer number (10237842).

Almost surely, 2^20475683 is an apocalyptic number.

20475683 is a deficient number, since it is larger than the sum of its proper divisors (1).

20475683 is an equidigital number, since it uses as much as digits as its factorization.

20475683 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 20475683 is about 4525.0064088352. The cubic root of 20475683 is about 273.5769262472.

The spelling of 20475683 in words is "twenty million, four hundred seventy-five thousand, six hundred eighty-three".