18086867851 has 8 divisors (see below), whose sum is σ = 20623940064. Its totient is φ = 15713477760.

The previous prime is 18086867839. The next prime is 18086867873. The reversal of 18086867851 is 15876868081.

It is a happy number.

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 18086867851 - 2⁷ = 18086867723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18086867651) 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, 40920295 + ... + 40920736.

It is an arithmetic number, because the mean of its divisors is an integer number (2577992508).

Almost surely, 2^18086867851 is an apocalyptic number.

18086867851 is a deficient number, since it is larger than the sum of its proper divisors (2537072213).

18086867851 is a wasteful number, since it uses less digits than its factorization.

18086867851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81841061.

The product of its (nonzero) digits is 5160960, while the sum is 58.

The spelling of 18086867851 in words is "eighteen billion, eighty-six million, eight hundred sixty-seven thousand, eight hundred fifty-one".