18181909100000 has 72 divisors (see below), whose sum is σ = 44741678521176. Its totient is φ = 7272763600000.

The previous prime is 18181909099943. The next prime is 18181909100023. The reversal of 18181909100000 is 190918181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90809546 + ... + 91009545.

It is an arithmetic number, because the mean of its divisors is an integer number (621412201683).

Almost surely, 2^{18181909100000} is an apocalyptic number.

18181909100000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18181909100000 is an abundant number, since it is smaller than the sum of its proper divisors (26559769421176).

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

18181909100000 is an frugal number, since it uses more digits than its factorization.

18181909100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181819126 (or 181819098 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 38.

The spelling of 18181909100000 in words is "eighteen trillion, one hundred eighty-one billion, nine hundred nine million, one hundred thousand".