2180213668 has 6 divisors (see below), whose sum is σ = 3815373926. Its totient is φ = 1090106832.

The previous prime is 2180213647. The next prime is 2180213713. The reversal of 2180213668 is 8663120812.

It is a happy number.

2180213668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1967987044 + 212226624 = 44362^2 + 14568^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272526705 + ... + 272526712.

Almost surely, 2^2180213668 is an apocalyptic number.

It is an amenable number.

2180213668 is a deficient number, since it is larger than the sum of its proper divisors (1635160258).

2180213668 is a wasteful number, since it uses less digits than its factorization.

2180213668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545053421 (or 545053419 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 2180213668 is about 46692.7581965341. The cubic root of 2180213668 is about 1296.6806179913.

The spelling of 2180213668 in words is "two billion, one hundred eighty million, two hundred thirteen thousand, six hundred sixty-eight".