2181055020 has 48 divisors (see below), whose sum is σ = 6198114048. Its totient is φ = 572932800.

The previous prime is 2181054949. The next prime is 2181055043. The reversal of 2181055020 is 205501812.

It is a super-3 number, since 3×2181055020³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267256 + ... + 275295.

It is an arithmetic number, because the mean of its divisors is an integer number (129127376).

Almost surely, 2^2181055020 is an apocalyptic number.

2181055020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2181055020 is an abundant number, since it is smaller than the sum of its proper divisors (4017059028).

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

2181055020 is a wasteful number, since it uses less digits than its factorization.

2181055020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542630 (or 542628 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 2181055020 is about 46701.7667760011. The cubic root of 2181055020 is about 1296.8473943860.

Adding to 2181055020 its reverse (205501812), we get a palindrome (2386556832).

The spelling of 2181055020 in words is "two billion, one hundred eighty-one million, fifty-five thousand, twenty".