19257028191 has 12 divisors (see below), whose sum is σ = 27903458232. Its totient is φ = 12797518416.

The previous prime is 19257028187. The next prime is 19257028213. The reversal of 19257028191 is 19182075291.

It is not a de Polignac number, because 19257028191 - 2² = 19257028187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19257021191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3372021 + ... + 3377726.

It is an arithmetic number, because the mean of its divisors is an integer number (2325288186).

Almost surely, 2^19257028191 is an apocalyptic number.

19257028191 is a deficient number, since it is larger than the sum of its proper divisors (8646430041).

19257028191 is a wasteful number, since it uses less digits than its factorization.

19257028191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6750070 (or 6750067 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 45.

The spelling of 19257028191 in words is "nineteen billion, two hundred fifty-seven million, twenty-eight thousand, one hundred ninety-one".