1800816180 has 24 divisors (see below), whose sum is σ = 5042285472. Its totient is φ = 480217632.

The previous prime is 1800816167. The next prime is 1800816209. The reversal of 1800816180 is 816180081.

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, 15006742 + ... + 15006861.

It is an arithmetic number, because the mean of its divisors is an integer number (210095228).

Almost surely, 2^1800816180 is an apocalyptic number.

1800816180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1800816180 is an abundant number, since it is smaller than the sum of its proper divisors (3241469292).

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

1800816180 is a wasteful number, since it uses less digits than its factorization.

1800816180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30013615 (or 30013613 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 33.

The square root of 1800816180 is about 42436.0245546163. The cubic root of 1800816180 is about 1216.6242295409.

The spelling of 1800816180 in words is "one billion, eight hundred million, eight hundred sixteen thousand, one hundred eighty".