18385408851 has 8 divisors (see below), whose sum is σ = 24756590544. Its totient is φ = 12135583200.

The previous prime is 18385408837. The next prime is 18385408889. The reversal of 18385408851 is 15880458381.

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

It is not a de Polignac number, because 18385408851 - 2⁵ = 18385408819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18385408794 and 18385408803.

It is not an unprimeable number, because it can be changed into a prime (18385408801) 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, 30338656 + ... + 30339261.

It is an arithmetic number, because the mean of its divisors is an integer number (3094573818).

Almost surely, 2^18385408851 is an apocalyptic number.

18385408851 is a deficient number, since it is larger than the sum of its proper divisors (6371181693).

18385408851 is a wasteful number, since it uses less digits than its factorization.

18385408851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60678021.

The product of its (nonzero) digits is 1228800, while the sum is 51.

The spelling of 18385408851 in words is "eighteen billion, three hundred eighty-five million, four hundred eight thousand, eight hundred fifty-one".