1818795900 has 144 divisors (see below), whose sum is σ = 5730883200. Its totient is φ = 443600640.

The previous prime is 1818795851. The next prime is 1818795917. The reversal of 1818795900 is 95978181.

It is a self number, because there is not a number n which added to its sum of digits gives 1818795900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 159799 + ... + 170801.

It is an arithmetic number, because the mean of its divisors is an integer number (39797800).

Almost surely, 2^1818795900 is an apocalyptic number.

1818795900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1818795900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2865441600).

1818795900 is an abundant number, since it is smaller than the sum of its proper divisors (3912087300).

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

1818795900 is a wasteful number, since it uses less digits than its factorization.

1818795900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11068 (or 11061 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 48.

The square root of 1818795900 is about 42647.3434108152. The cubic root of 1818795900 is about 1220.6598374545.

The spelling of 1818795900 in words is "one billion, eight hundred eighteen million, seven hundred ninety-five thousand, nine hundred".