19712725 has 12 divisors (see below), whose sum is σ = 25507296. Its totient is φ = 15084080.

The previous prime is 19712713. The next prime is 19712729. The reversal of 19712725 is 52721791.

It is not a de Polignac number, because 19712725 - 2⁹ = 19712213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19712729) 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, 16567 + ... + 17716.

It is an arithmetic number, because the mean of its divisors is an integer number (2125608).

Almost surely, 2^19712725 is an apocalyptic number.

It is an amenable number.

19712725 is a deficient number, since it is larger than the sum of its proper divisors (5794571).

19712725 is a wasteful number, since it uses less digits than its factorization.

19712725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34316 (or 34311 counting only the distinct ones).

The product of its digits is 8820, while the sum is 34.

The square root of 19712725 is about 4439.9014628705. The cubic root of 19712725 is about 270.1358484184.

The spelling of 19712725 in words is "nineteen million, seven hundred twelve thousand, seven hundred twenty-five".