1805042018 has 32 divisors (see below), whose sum is σ = 2942365440. Its totient is φ = 830466000.

The previous prime is 1805041967. The next prime is 1805042059. The reversal of 1805042018 is 8102405081.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2403143 + ... + 2403893.

It is an arithmetic number, because the mean of its divisors is an integer number (91948920).

Almost surely, 2^1805042018 is an apocalyptic number.

1805042018 is a deficient number, since it is larger than the sum of its proper divisors (1137323422).

1805042018 is an equidigital number, since it uses as much as digits as its factorization.

1805042018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 1805042018 is about 42485.7860701670. The cubic root of 1805042018 is about 1217.5751392192.

Adding to 1805042018 its reverse (8102405081), we get a palindrome (9907447099).

The spelling of 1805042018 in words is "one billion, eight hundred five million, forty-two thousand, eighteen".