2181346808 has 16 divisors (see below), whose sum is σ = 4096516560. Its totient is φ = 1088942400.

The previous prime is 2181346807. The next prime is 2181346859. The reversal of 2181346808 is 8086431812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181346801) 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 3 ways as a sum of consecutive naturals, for example, 211013 + ... + 221108.

It is an arithmetic number, because the mean of its divisors is an integer number (256032285).

Almost surely, 2^2181346808 is an apocalyptic number.

It is an amenable number.

2181346808 is a deficient number, since it is larger than the sum of its proper divisors (1915169752).

2181346808 is a wasteful number, since it uses less digits than its factorization.

2181346808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432758 (or 432754 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 2181346808 is about 46704.8906218610. The cubic root of 2181346808 is about 1296.9052238356.

The spelling of 2181346808 in words is "two billion, one hundred eighty-one million, three hundred forty-six thousand, eight hundred eight".