19600840009 has 9 divisors (see below), whose sum is σ = 19730917479. Its totient is φ = 19471617240.

The previous prime is 19600839989. The next prime is 19600840019. The reversal of 19600840009 is 90004800691.

The square root of 19600840009 is 140003.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 19175325625 + 425514384 = 138475^2 + 20628^2 .

It is not a de Polignac number, because 19600840009 - 2¹¹ = 19600837961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19600840009.

It is not an unprimeable number, because it can be changed into a prime (19600840019) 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 8 ways as a sum of consecutive naturals, for example, 26740207 + ... + 26740939.

Almost surely, 2^19600840009 is an apocalyptic number.

19600840009 is the 140003-rd square number.

19600840009 is the 70002-nd centered octagonal number.

It is an amenable number.

19600840009 is a deficient number, since it is larger than the sum of its proper divisors (130077470).

19600840009 is an frugal number, since it uses more digits than its factorization.

19600840009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848 (or 924 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 19600840009 in words is "nineteen billion, six hundred million, eight hundred forty thousand, nine".