2181076804 has 27 divisors (see below), whose sum is σ = 4031626557. Its totient is φ = 1032301008.

The previous prime is 2181076801. The next prime is 2181076819. The reversal of 2181076804 is 4086701812.

The square root of 2181076804 is 46702.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2152774404 + 28302400 = 46398^2 + 5320^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2181076801) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1774062 + ... + 1775290.

Almost surely, 2^2181076804 is an apocalyptic number.

2181076804 is the 46702-nd square number.

It is an amenable number.

2181076804 is a deficient number, since it is larger than the sum of its proper divisors (1850549753).

2181076804 is an equidigital number, since it uses as much as digits as its factorization.

2181076804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500 (or 1250 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The cubic root of 2181076804 is about 1296.8517119341.

The spelling of 2181076804 in words is "two billion, one hundred eighty-one million, seventy-six thousand, eight hundred four".