2118382720 has 128 divisors (see below), whose sum is σ = 5270054400. Its totient is φ = 813281280.

The previous prime is 2118382703. The next prime is 2118382723. The reversal of 2118382720 is 272838112.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (2118382723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5771977 + ... + 5772343.

It is an arithmetic number, because the mean of its divisors is an integer number (41172300).

Almost surely, 2^2118382720 is an apocalyptic number.

2118382720 is a gapful number since it is divisible by the number (20) 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 2118382720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2635027200).

2118382720 is an abundant number, since it is smaller than the sum of its proper divisors (3151671680).

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

2118382720 is a wasteful number, since it uses less digits than its factorization.

2118382720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 2118382720 is about 46025.8918436134. The cubic root of 2118382720 is about 1284.3049065135.

The spelling of 2118382720 in words is "two billion, one hundred eighteen million, three hundred eighty-two thousand, seven hundred twenty".