19538162781796 has 6 divisors (see below), whose sum is σ = 34191784868150. Its totient is φ = 9769081390896.

The previous prime is 19538162781791. The next prime is 19538162781827. The reversal of 19538162781796 is 69718726183591.

It can be written as a sum of positive squares in only one way, i.e., 12169381079296 + 7368781702500 = 3488464^2 + 2714550^2 .

It is not an unprimeable number, because it can be changed into a prime (19538162781791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2442270347721 + ... + 2442270347728.

Almost surely, 2^{19538162781796} is an apocalyptic number.

It is an amenable number.

19538162781796 is a deficient number, since it is larger than the sum of its proper divisors (14653622086354).

19538162781796 is a wasteful number, since it uses less digits than its factorization.

19538162781796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4884540695453 (or 4884540695451 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 73.

The spelling of 19538162781796 in words is "nineteen trillion, five hundred thirty-eight billion, one hundred sixty-two million, seven hundred eighty-one thousand, seven hundred ninety-six".