19803983 has 2 divisors, whose sum is σ = 19803984. Its totient is φ = 19803982.

The previous prime is 19803937. The next prime is 19804003. The reversal of 19803983 is 38930891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19803983 - 2⁶ = 19803919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19803983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19803083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9901991 + 9901992.

It is an arithmetic number, because the mean of its divisors is an integer number (9901992).

Almost surely, 2^19803983 is an apocalyptic number.

19803983 is a deficient number, since it is larger than the sum of its proper divisors (1).

19803983 is an equidigital number, since it uses as much as digits as its factorization.

19803983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 19803983 is about 4450.1666260939. The cubic root of 19803983 is about 270.5520620303.

The spelling of 19803983 in words is "nineteen million, eight hundred three thousand, nine hundred eighty-three".