18447289181860 has 192 divisors, whose sum is σ = 50968469422080. Its totient is φ = 5433458849280.

The previous prime is 18447289181831. The next prime is 18447289181911. The reversal of 18447289181860 is 6818198274481.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10822189 + ... + 12410251.

It is an arithmetic number, because the mean of its divisors is an integer number (265460778240).

Almost surely, 2^{18447289181860} is an apocalyptic number.

18447289181860 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 18447289181860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25484234711040).

18447289181860 is an abundant number, since it is smaller than the sum of its proper divisors (32521180240220).

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

18447289181860 is a wasteful number, since it uses less digits than its factorization.

18447289181860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588506 (or 1588504 counting only the distinct ones).

The product of its (nonzero) digits is 49545216, while the sum is 67.

The spelling of 18447289181860 in words is "eighteen trillion, four hundred forty-seven billion, two hundred eighty-nine million, one hundred eighty-one thousand, eight hundred sixty".