1800818018 has 16 divisors (see below), whose sum is σ = 2718811224. Its totient is φ = 894566400.

The previous prime is 1800818011. The next prime is 1800818029. The reversal of 1800818018 is 8108180081.

It can be written as a sum of positive squares in 4 ways, for example, as 1715864929 + 84953089 = 41423^2 + 9217^2 .

It is not an unprimeable number, because it can be changed into a prime (1800818011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201746 + ... + 210482.

Almost surely, 2^1800818018 is an apocalyptic number.

1800818018 is a deficient number, since it is larger than the sum of its proper divisors (917993206).

1800818018 is a wasteful number, since it uses less digits than its factorization.

1800818018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9397.

The product of its (nonzero) digits is 4096, while the sum is 35.

The square root of 1800818018 is about 42436.0462107393. The cubic root of 1800818018 is about 1216.6246434559.

Adding to 1800818018 its reverse (8108180081), we get a palindrome (9908998099).

The spelling of 1800818018 in words is "one billion, eight hundred million, eight hundred eighteen thousand, eighteen".