18000181860 has 48 divisors (see below), whose sum is σ = 50411961600. Its totient is φ = 4798957824.

The previous prime is 18000181831. The next prime is 18000181861. The reversal of 18000181860 is 6818100081.

It is not an unprimeable number, because it can be changed into a prime (18000181861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252021 + ... + 315459.

It is an arithmetic number, because the mean of its divisors is an integer number (1050249200).

Almost surely, 2^18000181860 is an apocalyptic number.

18000181860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18000181860 is an abundant number, since it is smaller than the sum of its proper divisors (32411779740).

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

18000181860 is a wasteful number, since it uses less digits than its factorization.

18000181860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68180 (or 68178 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 33.

The spelling of 18000181860 in words is "eighteen billion, one hundred eighty-one thousand, eight hundred sixty".