18000862387 has 4 divisors (see below), whose sum is σ = 18003225240. Its totient is φ = 17998499536.

The previous prime is 18000862379. The next prime is 18000862421. The reversal of 18000862387 is 78326800081.

It is a happy number.

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 18000862387 - 2³ = 18000862379 is a prime.

It is a super-3 number, since 3×18000862387³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18000862357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1169962 + ... + 1185247.

It is an arithmetic number, because the mean of its divisors is an integer number (4500806310).

Almost surely, 2^18000862387 is an apocalyptic number.

18000862387 is a deficient number, since it is larger than the sum of its proper divisors (2362853).

18000862387 is an equidigital number, since it uses as much as digits as its factorization.

18000862387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362852.

The product of its (nonzero) digits is 129024, while the sum is 43.

The spelling of 18000862387 in words is "eighteen billion, eight hundred sixty-two thousand, three hundred eighty-seven".