1818949100 has 36 divisors (see below), whose sum is σ = 3985463664. Its totient is φ = 720511680.

The previous prime is 1818949007. The next prime is 1818949109. The reversal of 1818949100 is 19498181.

It is not an unprimeable number, because it can be changed into a prime (1818949109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77999 + ... + 98598.

It is an arithmetic number, because the mean of its divisors is an integer number (110707324).

Almost surely, 2^1818949100 is an apocalyptic number.

1818949100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1818949100 is an abundant number, since it is smaller than the sum of its proper divisors (2166514564).

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

1818949100 is a wasteful number, since it uses less digits than its factorization.

1818949100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176714 (or 176707 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 41.

The square root of 1818949100 is about 42649.1394989395. The cubic root of 1818949100 is about 1220.6941091828.

The spelling of 1818949100 in words is "one billion, eight hundred eighteen million, nine hundred forty-nine thousand, one hundred".