2118386987 has 8 divisors (see below), whose sum is σ = 2141343600. Its totient is φ = 2095494624.

The previous prime is 2118386951. The next prime is 2118386993. The reversal of 2118386987 is 7896838112.

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

It is a cyclic number.

It is not a de Polignac number, because 2118386987 - 2⁶ = 2118386923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2118386087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51773 + ... + 83169.

It is an arithmetic number, because the mean of its divisors is an integer number (267667950).

Almost surely, 2^2118386987 is an apocalyptic number.

2118386987 is a deficient number, since it is larger than the sum of its proper divisors (22956613).

2118386987 is a wasteful number, since it uses less digits than its factorization.

2118386987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32125.

The product of its digits is 1161216, while the sum is 53.

The square root of 2118386987 is about 46025.9381979336. The cubic root of 2118386987 is about 1284.3057688263.

The spelling of 2118386987 in words is "two billion, one hundred eighteen million, three hundred eighty-six thousand, nine hundred eighty-seven".