1812023730000 has 1600 divisors, whose sum is σ = 7547324083200. Its totient is φ = 411505920000.

The previous prime is 1812023729977. The next prime is 1812023730007. The reversal of 1812023730000 is 373202181.

1812023730000 is a `hidden beast` number, since 1 + 8 + 120 + 237 + 300 + 0 + 0 = 666.

It is a super-2 number, since 2×1812023730000² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812023730007) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 9198089902 + ... + 9198090098.

It is an arithmetic number, because the mean of its divisors is an integer number (4717077552).

Almost surely, 2^{1812023730000} is an apocalyptic number.

1812023730000 is a gapful number since it is divisible by the number (10) 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 1812023730000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3773662041600).

1812023730000 is an abundant number, since it is smaller than the sum of its proper divisors (5735300353200).

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

1812023730000 is a wasteful number, since it uses less digits than its factorization.

1812023730000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

Adding to 1812023730000 its reverse (373202181), we get a palindrome (1812396932181).

The spelling of 1812023730000 in words is "one trillion, eight hundred twelve billion, twenty-three million, seven hundred thirty thousand".