2118640267 has 4 divisors (see below), whose sum is σ = 2128141120. Its totient is φ = 2109139416.

The previous prime is 2118640261. The next prime is 2118640357. The reversal of 2118640267 is 7620468112.

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 2118640267 - 2²³ = 2110251659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2118640261) 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, 4750092 + ... + 4750537.

It is an arithmetic number, because the mean of its divisors is an integer number (532035280).

Almost surely, 2^2118640267 is an apocalyptic number.

2118640267 is a deficient number, since it is larger than the sum of its proper divisors (9500853).

2118640267 is an equidigital number, since it uses as much as digits as its factorization.

2118640267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9500852.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 2118640267 is about 46028.6896076784. The cubic root of 2118640267 is about 1284.3569517946.

The spelling of 2118640267 in words is "two billion, one hundred eighteen million, six hundred forty thousand, two hundred sixty-seven".