19109800117 has 2 divisors, whose sum is σ = 19109800118. Its totient is φ = 19109800116.

The previous prime is 19109800097. The next prime is 19109800189. The reversal of 19109800117 is 71100890191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19045656036 + 64144081 = 138006^2 + 8009^2 .

It is a cyclic number.

It is not a de Polignac number, because 19109800117 - 2²⁷ = 18975582389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19109803117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9554900058 + 9554900059.

It is an arithmetic number, because the mean of its divisors is an integer number (9554900059).

Almost surely, 2^19109800117 is an apocalyptic number.

It is an amenable number.

19109800117 is a deficient number, since it is larger than the sum of its proper divisors (1).

19109800117 is an equidigital number, since it uses as much as digits as its factorization.

19109800117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 37.

The spelling of 19109800117 in words is "nineteen billion, one hundred nine million, eight hundred thousand, one hundred seventeen".