19045850691 has 8 divisors (see below), whose sum is σ = 29022248704. Its totient is φ = 10883343240.

The previous prime is 19045850689. The next prime is 19045850699. The reversal of 19045850691 is 19605854091.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19045850691 - 2¹ = 19045850689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19045850691.

It is not an unprimeable number, because it can be changed into a prime (19045850699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453472615 + ... + 453472656.

It is an arithmetic number, because the mean of its divisors is an integer number (3627781088).

Almost surely, 2^19045850691 is an apocalyptic number.

19045850691 is a deficient number, since it is larger than the sum of its proper divisors (9976398013).

19045850691 is an equidigital number, since it uses as much as digits as its factorization.

19045850691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906945281.

The product of its (nonzero) digits is 388800, while the sum is 48.

The spelling of 19045850691 in words is "nineteen billion, forty-five million, eight hundred fifty thousand, six hundred ninety-one".