18718530000 has 400 divisors, whose sum is σ = 64707287040. Its totient is φ = 4660992000.

The previous prime is 18718529981. The next prime is 18718530007. The reversal of 18718530000 is 3581781.

It is a tau number, because it is divible by the number of its divisors (400).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18718530007) 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 79 ways as a sum of consecutive naturals, for example, 147389937 + ... + 147390063.

Almost surely, 2^18718530000 is an apocalyptic number.

18718530000 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 18718530000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32353643520).

18718530000 is an abundant number, since it is smaller than the sum of its proper divisors (45988757040).

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

18718530000 is an equidigital number, since it uses as much as digits as its factorization.

18718530000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 33.

The spelling of 18718530000 in words is "eighteen billion, seven hundred eighteen million, five hundred thirty thousand".