2117381760 has 192 divisors, whose sum is σ = 7874291880. Its totient is φ = 521183232.

The previous prime is 2117381743. The next prime is 2117381767. The reversal of 2117381760 is 671837112.

2117381760 is a `hidden beast` number, since 211 + 7 + 381 + 7 + 60 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1192735296 + 924646464 = 34536^2 + 30408^2 .

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2117381767) 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, 60742 + ... + 89018.

Almost surely, 2^2117381760 is an apocalyptic number.

2117381760 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 2117381760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3937145940).

2117381760 is an abundant number, since it is smaller than the sum of its proper divisors (5756910120).

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

2117381760 is a wasteful number, since it uses less digits than its factorization.

2117381760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28315 (or 28300 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 2117381760 is about 46015.0166793407. The cubic root of 2117381760 is about 1284.1025917386.

The spelling of 2117381760 in words is "two billion, one hundred seventeen million, three hundred eighty-one thousand, seven hundred sixty".