2180212818 has 32 divisors (see below), whose sum is σ = 4987422720. Its totient is φ = 622408080.

The previous prime is 2180212813. The next prime is 2180212819. The reversal of 2180212818 is 8182120812.

It is a super-2 number, since 2×2180212818² = 9506655863543002248, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2180212813) 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, 32263 + ... + 73493.

It is an arithmetic number, because the mean of its divisors is an integer number (155856960).

Almost surely, 2^2180212818 is an apocalyptic number.

2180212818 is an abundant number, since it is smaller than the sum of its proper divisors (2807209902).

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

2180212818 is a wasteful number, since it uses less digits than its factorization.

2180212818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42502.

The product of its (nonzero) digits is 4096, while the sum is 33.

The square root of 2180212818 is about 46692.7490944793. The cubic root of 2180212818 is about 1296.6804494790.

The spelling of 2180212818 in words is "two billion, one hundred eighty million, two hundred twelve thousand, eight hundred eighteen".