2181941760 has 240 divisors, whose sum is σ = 7371197856. Its totient is φ = 550526976.

The previous prime is 2181941743. The next prime is 2181941767. The reversal of 2181941760 is 671491812.

It is a tau number, because it is divible by the number of its divisors (240).

It is not an unprimeable number, because it can be changed into a prime (2181941767) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2772087 + ... + 2772873.

Almost surely, 2^2181941760 is an apocalyptic number.

2181941760 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 2181941760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3685598928).

2181941760 is an abundant number, since it is smaller than the sum of its proper divisors (5189256096).

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

2181941760 is an equidigital number, since it uses as much as digits as its factorization.

2181941760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 2181941760 is about 46711.2594563666. The cubic root of 2181941760 is about 1297.0231213680.

The spelling of 2181941760 in words is "two billion, one hundred eighty-one million, nine hundred forty-one thousand, seven hundred sixty".