1803118020 has 48 divisors (see below), whose sum is σ = 5507707968. Its totient is φ = 437119360.

The previous prime is 1803118019. The next prime is 1803118027. The reversal of 1803118020 is 208113081.

It is not an unprimeable number, because it can be changed into a prime (1803118027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1365339 + ... + 1366658.

It is an arithmetic number, because the mean of its divisors is an integer number (114743916).

Almost surely, 2^1803118020 is an apocalyptic number.

1803118020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1803118020 is an abundant number, since it is smaller than the sum of its proper divisors (3704589948).

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

1803118020 is a wasteful number, since it uses less digits than its factorization.

1803118020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732020 (or 2732018 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 1803118020 is about 42463.1371898026. The cubic root of 1803118020 is about 1217.1423801414.

The spelling of 1803118020 in words is "one billion, eight hundred three million, one hundred eighteen thousand, twenty".