1818995199 has 20 divisors (see below), whose sum is σ = 2829390936. Its totient is φ = 1039421712.

The previous prime is 1818995137. The next prime is 1818995203. The reversal of 1818995199 is 9915998181.

It is not a de Polignac number, because 1818995199 - 2⁷ = 1818995071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818995599) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 119064 + ... + 133469.

Almost surely, 2^1818995199 is an apocalyptic number.

1818995199 is a deficient number, since it is larger than the sum of its proper divisors (1010395737).

1818995199 is an frugal number, since it uses more digits than its factorization.

1818995199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252564 (or 252543 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 60.

The square root of 1818995199 is about 42649.6799401824. The cubic root of 1818995199 is about 1220.7044214198.

The spelling of 1818995199 in words is "one billion, eight hundred eighteen million, nine hundred ninety-five thousand, one hundred ninety-nine".