19383969814729 has 27 divisors (see below), whose sum is σ = 21084808570293. Its totient is φ = 17812219717344.

The previous prime is 19383969814717. The next prime is 19383969814829. The reversal of 19383969814729 is 92741896938391.

The square root of 19383969814729 is 4402723.

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

It can be written as a sum of positive squares in 4 ways, for example, as 12206114375625 + 7177855439104 = 3493725^2 + 2679152^2 .

It is not a de Polignac number, because 19383969814729 - 2⁴¹ = 17184946559177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19383969814529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 15396321702 + ... + 15396322960.

Almost surely, 2^{19383969814729} is an apocalyptic number.

19383969814729 is the 4402723-rd square number.

19383969814729 is the 2201362-nd centered octagonal number.

It is an amenable number.

19383969814729 is a deficient number, since it is larger than the sum of its proper divisors (1700838755564).

19383969814729 is an frugal number, since it uses more digits than its factorization.

19383969814729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3082 (or 1541 counting only the distinct ones).

The product of its digits is 1269789696, while the sum is 79.

The spelling of 19383969814729 in words is "nineteen trillion, three hundred eighty-three billion, nine hundred sixty-nine million, eight hundred fourteen thousand, seven hundred twenty-nine".