19091414091 has 4 divisors (see below), whose sum is σ = 25455218792. Its totient is φ = 12727609392.

The previous prime is 19091414081. The next prime is 19091414099. The reversal of 19091414091 is 19041419091.

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

It is not a de Polignac number, because 19091414091 - 2¹⁴ = 19091397707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19091414099) 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, 3181902346 + ... + 3181902351.

It is an arithmetic number, because the mean of its divisors is an integer number (6363804698).

Almost surely, 2^19091414091 is an apocalyptic number.

19091414091 is a deficient number, since it is larger than the sum of its proper divisors (6363804701).

19091414091 is an equidigital number, since it uses as much as digits as its factorization.

19091414091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6363804700.

The product of its (nonzero) digits is 11664, while the sum is 39.

Subtracting from 19091414091 its reverse (19041419091), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 19091414091 in words is "nineteen billion, ninety-one million, four hundred fourteen thousand, ninety-one".