1819091092 has 72 divisors (see below), whose sum is σ = 4080997536. Its totient is φ = 702862272.

The previous prime is 1819091083. The next prime is 1819091093. The reversal of 1819091092 is 2901909181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819091093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101263 + ... + 117865.

Almost surely, 2^1819091092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1819091092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2040498768).

1819091092 is an abundant number, since it is smaller than the sum of its proper divisors (2261906444).

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

1819091092 is a wasteful number, since it uses less digits than its factorization.

1819091092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16677 (or 16668 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 40.

The square root of 1819091092 is about 42650.8041190316. The cubic root of 1819091092 is about 1220.7258718983.

The spelling of 1819091092 in words is "one billion, eight hundred nineteen million, ninety-one thousand, ninety-two".