18201000020180 has 24 divisors (see below), whose sum is σ = 38593188396672. Its totient is φ = 7209716512032.

The previous prime is 18201000020129. The next prime is 18201000020197. The reversal of 18201000020180 is 8102000010281.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4417716392 + ... + 4417720511.

It is an arithmetic number, because the mean of its divisors is an integer number (1608049516528).

Almost surely, 2^{18201000020180} is an apocalyptic number.

18201000020180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18201000020180 is an abundant number, since it is smaller than the sum of its proper divisors (20392188376492).

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

18201000020180 is a wasteful number, since it uses less digits than its factorization.

18201000020180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8835437015 (or 8835437013 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 23.

The spelling of 18201000020180 in words is "eighteen trillion, two hundred one billion, twenty thousand, one hundred eighty".