18218847764480 has 272 divisors, whose sum is σ = 47743331067648. Its totient is φ = 6619004928000.

The previous prime is 18218847764419. The next prime is 18218847764549. The reversal of 18218847764480 is 8446774881281.

It is a self number, because there is not a number n which added to its sum of digits gives 18218847764480.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6527711885 + ... + 6527714675.

Almost surely, 2^{18218847764480} is an apocalyptic number.

18218847764480 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 18218847764480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23871665533824).

18218847764480 is an abundant number, since it is smaller than the sum of its proper divisors (29524483303168).

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

18218847764480 is an equidigital number, since it uses as much as digits as its factorization.

18218847764480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4650 (or 4620 counting only the distinct ones).

The product of its (nonzero) digits is 154140672, while the sum is 68.

The spelling of 18218847764480 in words is "eighteen trillion, two hundred eighteen billion, eight hundred forty-seven million, seven hundred sixty-four thousand, four hundred eighty".