18443845000 has 240 divisors, whose sum is σ = 50931009360. Its totient is φ = 6240528000.

The previous prime is 18443844973. The next prime is 18443845009. The reversal of 18443845000 is 54834481.

It is not an unprimeable number, because it can be changed into a prime (18443845009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 20334547 + ... + 20335453.

It is an arithmetic number, because the mean of its divisors is an integer number (212212539).

Almost surely, 2^18443845000 is an apocalyptic number.

18443845000 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 18443845000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25465504680).

18443845000 is an abundant number, since it is smaller than the sum of its proper divisors (32487164360).

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

18443845000 is an equidigital number, since it uses as much as digits as its factorization.

18443845000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030 (or 1004 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The spelling of 18443845000 in words is "eighteen billion, four hundred forty-three million, eight hundred forty-five thousand".