2109321568 has 24 divisors (see below), whose sum is σ = 4209618168. Its totient is φ = 1040212224.

The previous prime is 2109321541. The next prime is 2109321569. The reversal of 2109321568 is 8651239012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109321569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449146 + ... + 453817.

It is an arithmetic number, because the mean of its divisors is an integer number (175400757).

Almost surely, 2^2109321568 is an apocalyptic number.

It is an amenable number.

2109321568 is a deficient number, since it is larger than the sum of its proper divisors (2100296600).

2109321568 is an equidigital number, since it uses as much as digits as its factorization.

2109321568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903046 (or 903038 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 2109321568 is about 45927.3509795634. The cubic root of 2109321568 is about 1282.4711311831.

The spelling of 2109321568 in words is "two billion, one hundred nine million, three hundred twenty-one thousand, five hundred sixty-eight".