18868171203840 has 288 divisors, whose sum is σ = 68958456779520. Its totient is φ = 4307111903232.

The previous prime is 18868171203839. The next prime is 18868171203851. The reversal of 18868171203840 is 4830217186881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20214322 + ... + 21127118.

It is an arithmetic number, because the mean of its divisors is an integer number (239439086040).

Almost surely, 2^{18868171203840} is an apocalyptic number.

18868171203840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18868171203840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34479228389760).

18868171203840 is an abundant number, since it is smaller than the sum of its proper divisors (50090285575680).

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

18868171203840 is an equidigital number, since it uses as much as digits as its factorization.

18868171203840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913597 (or 913583 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 57.

The spelling of 18868171203840 in words is "eighteen trillion, eight hundred sixty-eight billion, one hundred seventy-one million, two hundred three thousand, eight hundred forty".