1811018244 has 72 divisors (see below), whose sum is σ = 4933810560. Its totient is φ = 515519424.

The previous prime is 1811018219. The next prime is 1811018249. The reversal of 1811018244 is 4428101181.

It is not an unprimeable number, because it can be changed into a prime (1811018249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157317 + ... + 168435.

Almost surely, 2^1811018244 is an apocalyptic number.

1811018244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1811018244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2466905280).

1811018244 is an abundant number, since it is smaller than the sum of its proper divisors (3122792316).

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

1811018244 is a wasteful number, since it uses less digits than its factorization.

1811018244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11417 (or 11408 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 1811018244 is about 42556.0600149967. The cubic root of 1811018244 is about 1218.9173957789.

The spelling of 1811018244 in words is "one billion, eight hundred eleven million, eighteen thousand, two hundred forty-four".