2181709011 has 8 divisors (see below), whose sum is σ = 2935633360. Its totient is φ = 1441128672.

The previous prime is 2181709003. The next prime is 2181709039. The reversal of 2181709011 is 1109071812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2181709011 - 2³ = 2181709003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2181709011.

It is not an unprimeable number, because it can be changed into a prime (2181709051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3335620 + ... + 3336273.

It is an arithmetic number, because the mean of its divisors is an integer number (366954170).

Almost surely, 2^2181709011 is an apocalyptic number.

2181709011 is a deficient number, since it is larger than the sum of its proper divisors (753924349).

2181709011 is a wasteful number, since it uses less digits than its factorization.

2181709011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6672005.

The product of its (nonzero) digits is 1008, while the sum is 30.

The square root of 2181709011 is about 46708.7680312808. The cubic root of 2181709011 is about 1296.9770016571.

The spelling of 2181709011 in words is "two billion, one hundred eighty-one million, seven hundred nine thousand, eleven".