1803001812 has 12 divisors (see below), whose sum is σ = 4207004256. Its totient is φ = 601000600.

The previous prime is 1803001801. The next prime is 1803001817. The reversal of 1803001812 is 2181003081.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803001817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75125064 + ... + 75125087.

It is an arithmetic number, because the mean of its divisors is an integer number (350583688).

Almost surely, 2^1803001812 is an apocalyptic number.

1803001812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1803001812 is an abundant number, since it is smaller than the sum of its proper divisors (2404002444).

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

1803001812 is a wasteful number, since it uses less digits than its factorization.

1803001812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150250158 (or 150250156 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 1803001812 is about 42461.7688279704. The cubic root of 1803001812 is about 1217.1162319694.

Adding to 1803001812 its reverse (2181003081), we get a palindrome (3984004893).

The spelling of 1803001812 in words is "one billion, eight hundred three million, one thousand, eight hundred twelve".