2181876548 has 12 divisors (see below), whose sum is σ = 3880879212. Its totient is φ = 1073053920.

The previous prime is 2181876547. The next prime is 2181876551. The reversal of 2181876548 is 8456781812.

It can be written as a sum of positive squares in 2 ways, for example, as 1171145284 + 1010731264 = 34222^2 + 31792^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2181876496 and 2181876505.

It is not an unprimeable number, because it can be changed into a prime (2181876547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4470815 + ... + 4471302.

It is an arithmetic number, because the mean of its divisors is an integer number (323406601).

Almost surely, 2^2181876548 is an apocalyptic number.

It is an amenable number.

2181876548 is a deficient number, since it is larger than the sum of its proper divisors (1699002664).

2181876548 is a wasteful number, since it uses less digits than its factorization.

2181876548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8942182 (or 8942180 counting only the distinct ones).

The product of its digits is 860160, while the sum is 50.

The square root of 2181876548 is about 46710.5614181632. The cubic root of 2181876548 is about 1297.0101998018.

The spelling of 2181876548 in words is "two billion, one hundred eighty-one million, eight hundred seventy-six thousand, five hundred forty-eight".