1812003397120 has 80 divisors (see below), whose sum is σ = 4965212929248. Its totient is φ = 621258301440.

The previous prime is 1812003397079. The next prime is 1812003397151. The reversal of 1812003397120 is 217933002181.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1812003397120² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1812003397120.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50540211 + ... + 50576050.

Almost surely, 2^{1812003397120} is an apocalyptic number.

1812003397120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1812003397120 is an abundant number, since it is smaller than the sum of its proper divisors (3153209532128).

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

1812003397120 is an equidigital number, since it uses as much as digits as its factorization.

1812003397120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101116291 (or 101116275 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 1812003397120 in words is "one trillion, eight hundred twelve billion, three million, three hundred ninety-seven thousand, one hundred twenty".