18726847680 has 224 divisors, whose sum is σ = 60522819264. Its totient is φ = 4904976384.

The previous prime is 18726847673. The next prime is 18726847723. The reversal of 18726847680 is 8674862781.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18726847680.

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, 24737862 + ... + 24738618.

Almost surely, 2^18726847680 is an apocalyptic number.

18726847680 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 18726847680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30261409632).

18726847680 is an abundant number, since it is smaller than the sum of its proper divisors (41795971584).

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

18726847680 is a wasteful number, since it uses less digits than its factorization.

18726847680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203 (or 1193 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 57.

The spelling of 18726847680 in words is "eighteen billion, seven hundred twenty-six million, eight hundred forty-seven thousand, six hundred eighty".