2118218830 has 32 divisors (see below), whose sum is σ = 4692671424. Its totient is φ = 670381056.

The previous prime is 2118218827. The next prime is 2118218831. The reversal of 2118218830 is 388128112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118218831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1162947 + ... + 1164766.

It is an arithmetic number, because the mean of its divisors is an integer number (146645982).

Almost surely, 2^2118218830 is an apocalyptic number.

2118218830 is an abundant number, since it is smaller than the sum of its proper divisors (2574452594).

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

2118218830 is a wasteful number, since it uses less digits than its factorization.

2118218830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327740.

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 2118218830 is about 46024.1113982660. Note that the first 3 decimals coincide. The cubic root of 2118218830 is about 1284.2717853094.

The spelling of 2118218830 in words is "two billion, one hundred eighteen million, two hundred eighteen thousand, eight hundred thirty".