18000038999980 has 24 divisors (see below), whose sum is σ = 38821705736688. Its totient is φ = 7005420583488.

The previous prime is 18000038999951. The next prime is 18000038999981. The reversal of 18000038999980 is 8999983000081.

It is not an unprimeable number, because it can be changed into a prime (18000038999981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12162187774 + ... + 12162189253.

It is an arithmetic number, because the mean of its divisors is an integer number (1617571072362).

Almost surely, 2^{18000038999980} is an apocalyptic number.

18000038999980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18000038999980 is an abundant number, since it is smaller than the sum of its proper divisors (20821666736708).

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

18000038999980 is a wasteful number, since it uses less digits than its factorization.

18000038999980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24324377073 (or 24324377071 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 64.

The spelling of 18000038999980 in words is "eighteen trillion, thirty-eight million, nine hundred ninety-nine thousand, nine hundred eighty".