2018181800 has 48 divisors (see below), whose sum is σ = 4745036700. Its totient is φ = 798195200.

The previous prime is 2018181791. The next prime is 2018181829. The reversal of 2018181800 is 81818102.

It can be written as a sum of positive squares in 6 ways, for example, as 976312516 + 1041869284 = 31246^2 + 32278^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38891 + ... + 74490.

Almost surely, 2^2018181800 is an apocalyptic number.

2018181800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2018181800 is an abundant number, since it is smaller than the sum of its proper divisors (2726854900).

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

2018181800 is a wasteful number, since it uses less digits than its factorization.

2018181800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113486 (or 113477 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 29.

The square root of 2018181800 is about 44924.1783452964. The cubic root of 2018181800 is about 1263.7274772325.

Adding to 2018181800 its reverse (81818102), we get a palindrome (2099999902).

The spelling of 2018181800 in words is "two billion, eighteen million, one hundred eighty-one thousand, eight hundred".