19109191092 has 24 divisors (see below), whose sum is σ = 44660162400. Its totient is φ = 6359437536.

The previous prime is 19109191007. The next prime is 19109191117. The reversal of 19109191092 is 29019190191.

It is a super-2 number, since 2×19109191092² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1278867 + ... + 1293722.

It is an arithmetic number, because the mean of its divisors is an integer number (1860840100).

Almost surely, 2^19109191092 is an apocalyptic number.

19109191092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19109191092 is an abundant number, since it is smaller than the sum of its proper divisors (25550971308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19109191092 is a wasteful number, since it uses less digits than its factorization.

19109191092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573215 (or 2573213 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 42.

Subtracting 19109191092 from its reverse (29019190191), we obtain a palindrome (9909999099).

The spelling of 19109191092 in words is "nineteen billion, one hundred nine million, one hundred ninety-one thousand, ninety-two".