19795104139 has 2 divisors, whose sum is σ = 19795104140. Its totient is φ = 19795104138.

The previous prime is 19795104103. The next prime is 19795104193. The reversal of 19795104139 is 93140159791.

Together with next prime (19795104193) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19795104139 - 2¹¹ = 19795102091 is a prime.

It is a super-2 number, since 2×19795104139² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19795104092 and 19795104101.

It is not a weakly prime, because it can be changed into another prime (19795108139) 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, 9897552069 + 9897552070.

It is an arithmetic number, because the mean of its divisors is an integer number (9897552070).

Almost surely, 2^19795104139 is an apocalyptic number.

19795104139 is a deficient number, since it is larger than the sum of its proper divisors (1).

19795104139 is an equidigital number, since it uses as much as digits as its factorization.

19795104139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 49.

The spelling of 19795104139 in words is "nineteen billion, seven hundred ninety-five million, one hundred four thousand, one hundred thirty-nine".