2118468857 has 4 divisors (see below), whose sum is σ = 2118602916. Its totient is φ = 2118334800.

The previous prime is 2118468851. The next prime is 2118468941. The reversal of 2118468857 is 7588648112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 396965776 + 1721503081 = 19924^2 + 41491^2 .

It is a cyclic number.

It is not a de Polignac number, because 2118468857 - 2⁸ = 2118468601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2118468851) 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 3 ways as a sum of consecutive naturals, for example, 39578 + ... + 76179.

It is an arithmetic number, because the mean of its divisors is an integer number (529650729).

Almost surely, 2^2118468857 is an apocalyptic number.

It is an amenable number.

2118468857 is a deficient number, since it is larger than the sum of its proper divisors (134059).

2118468857 is a wasteful number, since it uses less digits than its factorization.

2118468857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134058.

The product of its digits is 860160, while the sum is 50.

The square root of 2118468857 is about 46026.8275791413. The cubic root of 2118468857 is about 1284.3223136093.

The spelling of 2118468857 in words is "two billion, one hundred eighteen million, four hundred sixty-eight thousand, eight hundred fifty-seven".