19111090920109 has 16 divisors (see below), whose sum is σ = 19759606530048. Its totient is φ = 18473975260272.

The previous prime is 19111090920091. The next prime is 19111090920139. The reversal of 19111090920109 is 90102909011191.

It is a cyclic number.

It is not a de Polignac number, because 19111090920109 - 2²⁷ = 19110956702381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19111090920139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5847667 + ... + 8509840.

It is an arithmetic number, because the mean of its divisors is an integer number (1234975408128).

Almost surely, 2^{19111090920109} is an apocalyptic number.

It is an amenable number.

19111090920109 is a deficient number, since it is larger than the sum of its proper divisors (648515609939).

19111090920109 is a wasteful number, since it uses less digits than its factorization.

19111090920109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14357904.

The product of its (nonzero) digits is 13122, while the sum is 43.

The spelling of 19111090920109 in words is "nineteen trillion, one hundred eleven billion, ninety million, nine hundred twenty thousand, one hundred nine".