19104944091 has 4 divisors (see below), whose sum is σ = 25473258792. Its totient is φ = 12736629392.

The previous prime is 19104944069. The next prime is 19104944113. The reversal of 19104944091 is 19044940191.

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

It is an interprime number because it is at equal distance from previous prime (19104944069) and next prime (19104944113).

It is a cyclic number.

It is not a de Polignac number, because 19104944091 - 2⁵ = 19104944059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19104944041) 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, 3184157346 + ... + 3184157351.

It is an arithmetic number, because the mean of its divisors is an integer number (6368314698).

Almost surely, 2^19104944091 is an apocalyptic number.

19104944091 is a deficient number, since it is larger than the sum of its proper divisors (6368314701).

19104944091 is an equidigital number, since it uses as much as digits as its factorization.

19104944091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6368314700.

The product of its (nonzero) digits is 46656, while the sum is 42.

The spelling of 19104944091 in words is "nineteen billion, one hundred four million, nine hundred forty-four thousand, ninety-one".