2161827418 has 8 divisors (see below), whose sum is σ = 3321832500. Its totient is φ = 1054549920.

The previous prime is 2161827413. The next prime is 2161827443. The reversal of 2161827418 is 8147281612.

2161827418 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2037348769 + 124478649 = 45137^2 + 11157^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2161827413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13181793 + ... + 13181956.

Almost surely, 2^2161827418 is an apocalyptic number.

2161827418 is a deficient number, since it is larger than the sum of its proper divisors (1160005082).

2161827418 is a wasteful number, since it uses less digits than its factorization.

2161827418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26363792.

The product of its digits is 43008, while the sum is 40.

The square root of 2161827418 is about 46495.4558854949. The cubic root of 2161827418 is about 1293.0252531830.

The spelling of 2161827418 in words is "two billion, one hundred sixty-one million, eight hundred twenty-seven thousand, four hundred eighteen".