19097782189 has 16 divisors (see below), whose sum is σ = 20501268480. Its totient is φ = 17734766400.

The previous prime is 19097782181. The next prime is 19097782213. The reversal of 19097782189 is 98128779091.

It is a cyclic number.

It is not a de Polignac number, because 19097782189 - 2³ = 19097782181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19097782181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1150819 + ... + 1167295.

It is an arithmetic number, because the mean of its divisors is an integer number (1281329280).

Almost surely, 2^19097782189 is an apocalyptic number.

19097782189 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

19097782189 is a deficient number, since it is larger than the sum of its proper divisors (1403486291).

19097782189 is a wasteful number, since it uses less digits than its factorization.

19097782189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17700.

The product of its (nonzero) digits is 4572288, while the sum is 61.

The spelling of 19097782189 in words is "nineteen billion, ninety-seven million, seven hundred eighty-two thousand, one hundred eighty-nine".