2180018020 has 12 divisors (see below), whose sum is σ = 4578037884. Its totient is φ = 872007200.

The previous prime is 2180017981. The next prime is 2180018047. The reversal of 2180018020 is 208100812.

It can be written as a sum of positive squares in 2 ways, for example, as 962985024 + 1217032996 = 31032^2 + 34886^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2180017982 and 2180018000.

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, 54500431 + ... + 54500470.

It is an arithmetic number, because the mean of its divisors is an integer number (381503157).

Almost surely, 2^2180018020 is an apocalyptic number.

2180018020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2180018020 is an abundant number, since it is smaller than the sum of its proper divisors (2398019864).

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

2180018020 is a wasteful number, since it uses less digits than its factorization.

2180018020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109000910 (or 109000908 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 2180018020 is about 46690.6630923143. The cubic root of 2180018020 is about 1296.6418296587.

Adding to 2180018020 its reverse (208100812), we get a palindrome (2388118832).

The spelling of 2180018020 in words is "two billion, one hundred eighty million, eighteen thousand, twenty".