1812018 has 24 divisors (see below), whose sum is σ = 3926448. Its totient is φ = 557232.

The previous prime is 1811993. The next prime is 1812037. The reversal of 1812018 is 8102181.

It is a junction number, because it is equal to n+sod(n) for n = 1811985 and 1812003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121 + ... + 1907.

It is an arithmetic number, because the mean of its divisors is an integer number (163602).

2^1812018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1812018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1963224).

1812018 is an abundant number, since it is smaller than the sum of its proper divisors (2114430).

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

1812018 is a wasteful number, since it uses less digits than its factorization.

1812018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818 (or 1805 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 1812018 is about 1346.1121795749. The cubic root of 1812018 is about 121.9141651905.

Adding to 1812018 its reverse (8102181), we get a palindrome (9914199).

The spelling of 1812018 in words is "one million, eight hundred twelve thousand, eighteen".