2181357708 has 24 divisors (see below), whose sum is σ = 5161524480. Its totient is φ = 716877840.

The previous prime is 2181357691. The next prime is 2181357713. The reversal of 2181357708 is 8077531812.

It is a self number, because there is not a number n which added to its sum of digits gives 2181357708.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1279288 + ... + 1280991.

It is an arithmetic number, because the mean of its divisors is an integer number (215063520).

Almost surely, 2^2181357708 is an apocalyptic number.

It is an amenable number.

2181357708 is an abundant number, since it is smaller than the sum of its proper divisors (2980166772).

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

2181357708 is a wasteful number, since it uses less digits than its factorization.

2181357708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560357 (or 2560355 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 2181357708 is about 46705.0073118504. The cubic root of 2181357708 is about 1296.9073840062.

The spelling of 2181357708 in words is "two billion, one hundred eighty-one million, three hundred fifty-seven thousand, seven hundred eight".