2180020 has 12 divisors (see below), whose sum is σ = 4578084. Its totient is φ = 872000.

The previous prime is 2179997. The next prime is 2180021. The reversal of 2180020 is 200812.

It can be written as a sum of positive squares in 2 ways, for example, as 839056 + 1340964 = 916^2 + 1158^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54481 + ... + 54520.

It is an arithmetic number, because the mean of its divisors is an integer number (381507).

2^2180020 is an apocalyptic number.

2180020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2180020 is an abundant number, since it is smaller than the sum of its proper divisors (2398064).

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

2180020 is a wasteful number, since it uses less digits than its factorization.

2180020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109010 (or 109008 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2180020 is about 1476.4890788624. The cubic root of 2180020 is about 129.6642222217.

Adding to 2180020 its reverse (200812), we get a palindrome (2380832).

The spelling of 2180020 in words is "two million, one hundred eighty thousand, twenty".