1813020244 has 24 divisors (see below), whose sum is σ = 3743011328. Its totient is φ = 751943520.

The previous prime is 1813020203. The next prime is 1813020247. The reversal of 1813020244 is 4420203181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813020247) 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, 1043499 + ... + 1045234.

Almost surely, 2^1813020244 is an apocalyptic number.

1813020244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1813020244 is an abundant number, since it is smaller than the sum of its proper divisors (1929991084).

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

1813020244 is a wasteful number, since it uses less digits than its factorization.

1813020244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088775 (or 2088773 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 1813020244 is about 42579.5754323596. The cubic root of 1813020244 is about 1219.3663833364.

The spelling of 1813020244 in words is "one billion, eight hundred thirteen million, twenty thousand, two hundred forty-four".