2166234918 has 32 divisors (see below), whose sum is σ = 4455948672. Its totient is φ = 701640000.

The previous prime is 2166234907. The next prime is 2166234937. The reversal of 2166234918 is 8194326612.

It is a self number, because there is not a number n which added to its sum of digits gives 2166234918.

It is a congruent number.

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, 44205 + ... + 79287.

It is an arithmetic number, because the mean of its divisors is an integer number (139248396).

Almost surely, 2^2166234918 is an apocalyptic number.

2166234918 is an abundant number, since it is smaller than the sum of its proper divisors (2289713754).

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

2166234918 is a wasteful number, since it uses less digits than its factorization.

2166234918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35380.

The product of its digits is 124416, while the sum is 42.

The square root of 2166234918 is about 46542.8288568712. The cubic root of 2166234918 is about 1293.9033899112.

The spelling of 2166234918 in words is "two billion, one hundred sixty-six million, two hundred thirty-four thousand, nine hundred eighteen".