2118746851 has 4 divisors (see below), whose sum is σ = 2281727392. Its totient is φ = 1955766312.

The previous prime is 2118746849. The next prime is 2118746879. The reversal of 2118746851 is 1586478112.

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

It is a cyclic number.

It is not a de Polignac number, because 2118746851 - 2¹ = 2118746849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2118746798 and 2118746807.

It is not an unprimeable number, because it can be changed into a prime (2118746891) 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, 81490251 + ... + 81490276.

It is an arithmetic number, because the mean of its divisors is an integer number (570431848).

Almost surely, 2^2118746851 is an apocalyptic number.

2118746851 is a deficient number, since it is larger than the sum of its proper divisors (162980541).

2118746851 is a wasteful number, since it uses less digits than its factorization.

2118746851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162980540.

The product of its digits is 107520, while the sum is 43.

The square root of 2118746851 is about 46029.8473927516. The cubic root of 2118746851 is about 1284.3784891312.

The spelling of 2118746851 in words is "two billion, one hundred eighteen million, seven hundred forty-six thousand, eight hundred fifty-one".