18728247168 has 384 divisors, whose sum is σ = 59666181120. Its totient is φ = 5833783296.

The previous prime is 18728247157. The next prime is 18728247173. The reversal of 18728247168 is 86174282781.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33623146 + ... + 33623702.

It is an arithmetic number, because the mean of its divisors is an integer number (155380680).

Almost surely, 2^18728247168 is an apocalyptic number.

18728247168 is a gapful number since it is divisible by the number (18) 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 18728247168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29833090560).

18728247168 is an abundant number, since it is smaller than the sum of its proper divisors (40937933952).

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

18728247168 is an equidigital number, since it uses as much as digits as its factorization.

18728247168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 632 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The spelling of 18728247168 in words is "eighteen billion, seven hundred twenty-eight million, two hundred forty-seven thousand, one hundred sixty-eight".