18000003000000 has 588 divisors, whose sum is σ = 69250328428200. Its totient is φ = 4114252800000.

The previous prime is 18000002999983. The next prime is 18000003000013. The reversal of 18000003000000 is 30000081.

18000003000000 is a nontrivial binomial coefficient, being equal to C(6000001, 2).

It is a tau number, because it is divible by the number of its divisors (588).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 18000003000000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 146938776 + ... + 147061224.

Almost surely, 2^{18000003000000} is an apocalyptic number.

18000003000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18000003000000 is the 6000000-th triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18000003000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34625164214100).

18000003000000 is an abundant number, since it is smaller than the sum of its proper divisors (51250325428200).

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

18000003000000 is an frugal number, since it uses more digits than its factorization.

18000003000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122508 (or 122466 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 18000003000000 its reverse (30000081), we get a palindrome (18000033000081).

The spelling of 18000003000000 in words is "eighteen trillion, three million", and thus it is an aban number and an uban number.