20039983 has 2 divisors, whose sum is σ = 20039984. Its totient is φ = 20039982.

The previous prime is 20039959. The next prime is 20039993. The reversal of 20039983 is 38993002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20039983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20039933) 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, 10019991 + 10019992.

It is an arithmetic number, because the mean of its divisors is an integer number (10019992).

Almost surely, 2^20039983 is an apocalyptic number.

20039983 is a deficient number, since it is larger than the sum of its proper divisors (1).

20039983 is an equidigital number, since it uses as much as digits as its factorization.

20039983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 20039983 is about 4476.6039583595. The cubic root of 20039983 is about 271.6225255209.

The spelling of 20039983 in words is "twenty million, thirty-nine thousand, nine hundred eighty-three".