19984273 has 2 divisors, whose sum is σ = 19984274. Its totient is φ = 19984272.

The previous prime is 19984267. The next prime is 19984297. The reversal of 19984273 is 37248991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13749264 + 6235009 = 3708^2 + 2497^2 .

It is a cyclic number.

It is not a de Polignac number, because 19984273 - 2⁵ = 19984241 is a prime.

It is not a weakly prime, because it can be changed into another prime (19984213) 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, 9992136 + 9992137.

It is an arithmetic number, because the mean of its divisors is an integer number (9992137).

Almost surely, 2^19984273 is an apocalyptic number.

It is an amenable number.

19984273 is a deficient number, since it is larger than the sum of its proper divisors (1).

19984273 is an equidigital number, since it uses as much as digits as its factorization.

19984273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 19984273 is about 4470.3772771434. The cubic root of 19984273 is about 271.3705935921.

The spelling of 19984273 in words is "nineteen million, nine hundred eighty-four thousand, two hundred seventy-three".