18263118720 has 1024 divisors, whose sum is σ = 78173061120. Its totient is φ = 3514368000.

The previous prime is 18263118703. The next prime is 18263118733. The reversal of 18263118720 is 2781136281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 139413055 + ... + 139413185.

It is an arithmetic number, because the mean of its divisors is an integer number (76340880).

Almost surely, 2^18263118720 is an apocalyptic number.

18263118720 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 18263118720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39086530560).

18263118720 is an abundant number, since it is smaller than the sum of its proper divisors (59909942400).

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

18263118720 is a wasteful number, since it uses less digits than its factorization.

18263118720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 18263118720 in words is "eighteen billion, two hundred sixty-three million, one hundred eighteen thousand, seven hundred twenty".