8939243818 has 16 divisors (see below), whose sum is σ = 13471121664. Its totient is φ = 4448888640.

The previous prime is 8939243809. The next prime is 8939243827. The reversal of 8939243818 is 8183429398.

It is an interprime number because it is at equal distance from previous prime (8939243809) and next prime (8939243827).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1475271 + ... + 1481317.

It is an arithmetic number, because the mean of its divisors is an integer number (841945104).

Almost surely, 2^8939243818 is an apocalyptic number.

8939243818 is a deficient number, since it is larger than the sum of its proper divisors (4531877846).

8939243818 is a wasteful number, since it uses less digits than its factorization.

8939243818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9357.

The product of its digits is 2985984, while the sum is 55.

The square root of 8939243818 is about 94547.5743633860. The cubic root of 8939243818 is about 2075.3925859404.

The spelling of 8939243818 in words is "eight billion, nine hundred thirty-nine million, two hundred forty-three thousand, eight hundred eighteen".