2180056820 has 12 divisors (see below), whose sum is σ = 4578119364. Its totient is φ = 872022720.

The previous prime is 2180056799. The next prime is 2180056843. The reversal of 2180056820 is 286500812.

It can be written as a sum of positive squares in 2 ways, for example, as 682985956 + 1497070864 = 26134^2 + 38692^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54501401 + ... + 54501440.

It is an arithmetic number, because the mean of its divisors is an integer number (381509947).

Almost surely, 2^2180056820 is an apocalyptic number.

2180056820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2180056820 is an abundant number, since it is smaller than the sum of its proper divisors (2398062544).

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

2180056820 is a wasteful number, since it uses less digits than its factorization.

2180056820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109002850 (or 109002848 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 2180056820 is about 46691.0785910970. The cubic root of 2180056820 is about 1296.6495221646.

The spelling of 2180056820 in words is "two billion, one hundred eighty million, fifty-six thousand, eight hundred twenty".