2180000000 has 144 divisors (see below), whose sum is σ = 5489243760. Its totient is φ = 864000000.

The previous prime is 2179999973. The next prime is 2180000029. The reversal of 2180000000 is 812.

It can be written as a sum of positive squares in 8 ways, for example, as 1856575744 + 323424256 = 43088^2 + 17984^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19999946 + ... + 20000054.

Almost surely, 2^2180000000 is an apocalyptic number.

2180000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2180000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2744621880).

2180000000 is an abundant number, since it is smaller than the sum of its proper divisors (3309243760).

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

2180000000 is an frugal number, since it uses more digits than its factorization.

2180000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2180000000 is about 46690.4701197150. The cubic root of 2180000000 is about 1296.6382569742.

Adding to 2180000000 its reverse (812), we get a palindrome (2180000812).

The spelling of 2180000000 in words is "two billion, one hundred eighty million", and thus it is an aban number.