19704245 has 12 divisors (see below), whose sum is σ = 25990860. Its totient is φ = 14329920.

The previous prime is 19704221. The next prime is 19704247. The reversal of 19704245 is 54240791.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14569489 + 5134756 = 3817^2 + 2266^2 .

It is not a de Polignac number, because 19704245 - 2¹⁶ = 19638709 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19704247) 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 in 11 ways as a sum of consecutive naturals, for example, 15680 + ... + 16889.

It is an arithmetic number, because the mean of its divisors is an integer number (2165905).

Almost surely, 2^19704245 is an apocalyptic number.

It is an amenable number.

19704245 is a deficient number, since it is larger than the sum of its proper divisors (6286615).

19704245 is a wasteful number, since it uses less digits than its factorization.

19704245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32596 (or 32585 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 19704245 is about 4438.9463839970. The cubic root of 19704245 is about 270.0971072745.

The spelling of 19704245 in words is "nineteen million, seven hundred four thousand, two hundred forty-five".