19192102091 has 4 divisors (see below), whose sum is σ = 19660202184. Its totient is φ = 18724002000.

The previous prime is 19192102051. The next prime is 19192102123. The reversal of 19192102091 is 19020129191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19192102091 - 2²⁶ = 19124993227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19192102021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234049985 + ... + 234050066.

It is an arithmetic number, because the mean of its divisors is an integer number (4915050546).

Almost surely, 2^19192102091 is an apocalyptic number.

19192102091 is a deficient number, since it is larger than the sum of its proper divisors (468100093).

19192102091 is an equidigital number, since it uses as much as digits as its factorization.

19192102091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468100092.

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 19192102091 in words is "nineteen billion, one hundred ninety-two million, one hundred two thousand, ninety-one".