1811434518 has 12 divisors (see below), whose sum is σ = 3924774828. Its totient is φ = 603811500.

The previous prime is 1811434487. The next prime is 1811434543. The reversal of 1811434518 is 8154341181.

1811434518 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50317608 + ... + 50317643.

It is an arithmetic number, because the mean of its divisors is an integer number (327064569).

Almost surely, 2^1811434518 is an apocalyptic number.

1811434518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1811434518 is an abundant number, since it is smaller than the sum of its proper divisors (2113340310).

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

1811434518 is a wasteful number, since it uses less digits than its factorization.

1811434518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100635259 (or 100635256 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 1811434518 is about 42560.9506237819. The cubic root of 1811434518 is about 1219.0107805824.

Adding to 1811434518 its reverse (8154341181), we get a palindrome (9965775699).

The spelling of 1811434518 in words is "one billion, eight hundred eleven million, four hundred thirty-four thousand, five hundred eighteen".