2118530620 has 48 divisors (see below), whose sum is σ = 4671102240. Its totient is φ = 805964544.

The previous prime is 2118530587. The next prime is 2118530629. The reversal of 2118530620 is 260358112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118530629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11602 + ... + 66118.

It is an arithmetic number, because the mean of its divisors is an integer number (97314630).

Almost surely, 2^2118530620 is an apocalyptic number.

2118530620 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 2118530620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2335551120).

2118530620 is an abundant number, since it is smaller than the sum of its proper divisors (2552571620).

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

2118530620 is a wasteful number, since it uses less digits than its factorization.

2118530620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54622 (or 54620 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2118530620 is about 46027.4985199066. The cubic root of 2118530620 is about 1284.3347947664.

Adding to 2118530620 its reverse (260358112), we get a palindrome (2378888732).

The spelling of 2118530620 in words is "two billion, one hundred eighteen million, five hundred thirty thousand, six hundred twenty".