18385843 has 8 divisors (see below), whose sum is σ = 21038688. Its totient is φ = 15739584.

The previous prime is 18385841. The next prime is 18385847. The reversal of 18385843 is 34858381.

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

It is not a de Polignac number, because 18385843 - 2¹ = 18385841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18385796 and 18385805.

It is not an unprimeable number, because it can be changed into a prime (18385841) 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, 8655 + ... + 10567.

It is an arithmetic number, because the mean of its divisors is an integer number (2629836).

Almost surely, 2^18385843 is an apocalyptic number.

18385843 is a deficient number, since it is larger than the sum of its proper divisors (2652845).

18385843 is a wasteful number, since it uses less digits than its factorization.

18385843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3293.

The product of its digits is 92160, while the sum is 40.

The square root of 18385843 is about 4287.8716165482. The cubic root of 18385843 is about 263.9334992816.

The spelling of 18385843 in words is "eighteen million, three hundred eighty-five thousand, eight hundred forty-three".