2180000811 has 8 divisors (see below), whose sum is σ = 2913917904. Its totient is φ = 1449708800.

The previous prime is 2180000807. The next prime is 2180000821. The reversal of 2180000811 is 1180000812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2180000811 - 2² = 2180000807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2180000821) 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 7 ways as a sum of consecutive naturals, for example, 904866 + ... + 907271.

It is an arithmetic number, because the mean of its divisors is an integer number (364239738).

Almost surely, 2^2180000811 is an apocalyptic number.

2180000811 is a deficient number, since it is larger than the sum of its proper divisors (733917093).

2180000811 is a wasteful number, since it uses less digits than its factorization.

2180000811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812541.

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 2180000811 is about 46690.4788045700. The cubic root of 2180000811 is about 1296.6384177652.

Subtracting from 2180000811 its reverse (1180000812), we obtain a palindrome (999999999).

The spelling of 2180000811 in words is "two billion, one hundred eighty million, eight hundred eleven", and thus it is an aban number.