19745716 has 12 divisors (see below), whose sum is σ = 35489188. Its totient is φ = 9605952.

The previous prime is 19745711. The next prime is 19745743. The reversal of 19745716 is 61754791.

It can be written as a sum of positive squares in 2 ways, for example, as 14409616 + 5336100 = 3796^2 + 2310^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19745711) 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 3 ways as a sum of consecutive naturals, for example, 66561 + ... + 66856.

Almost surely, 2^19745716 is an apocalyptic number.

It is an amenable number.

19745716 is a deficient number, since it is larger than the sum of its proper divisors (15743472).

19745716 is a wasteful number, since it uses less digits than its factorization.

19745716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133458 (or 133456 counting only the distinct ones).

The product of its digits is 52920, while the sum is 40.

The square root of 19745716 is about 4443.6151948610. The cubic root of 19745716 is about 270.2864632233.

The spelling of 19745716 in words is "nineteen million, seven hundred forty-five thousand, seven hundred sixteen".