19938806070787 has 2 divisors, whose sum is σ = 19938806070788. Its totient is φ = 19938806070786.

The previous prime is 19938806070773. The next prime is 19938806070809. The reversal of 19938806070787 is 78707060883991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19938806070787 - 2¹¹ = 19938806068739 is a prime.

It is not a weakly prime, because it can be changed into another prime (19938806070727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9969403035393 + 9969403035394.

It is an arithmetic number, because the mean of its divisors is an integer number (9969403035394).

Almost surely, 2^{19938806070787} is an apocalyptic number.

19938806070787 is a deficient number, since it is larger than the sum of its proper divisors (1).

19938806070787 is an equidigital number, since it uses as much as digits as its factorization.

19938806070787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256048128, while the sum is 73.

The spelling of 19938806070787 in words is "nineteen trillion, nine hundred thirty-eight billion, eight hundred six million, seventy thousand, seven hundred eighty-seven".