19706281140109 has 2 divisors, whose sum is σ = 19706281140110. Its totient is φ = 19706281140108.

The previous prime is 19706281140023. The next prime is 19706281140181. The reversal of 19706281140109 is 90104118260791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19284859451209 + 421421688900 = 4391453^2 + 649170^2 .

It is a cyclic number.

It is not a de Polignac number, because 19706281140109 - 2⁷ = 19706281139981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19706281140809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9853140570054 + 9853140570055.

It is an arithmetic number, because the mean of its divisors is an integer number (9853140570055).

Almost surely, 2^{19706281140109} is an apocalyptic number.

It is an amenable number.

19706281140109 is a deficient number, since it is larger than the sum of its proper divisors (1).

19706281140109 is an equidigital number, since it uses as much as digits as its factorization.

19706281140109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 49.

The spelling of 19706281140109 in words is "nineteen trillion, seven hundred six billion, two hundred eighty-one million, one hundred forty thousand, one hundred nine".