18818113 has 8 divisors (see below), whose sum is σ = 19848800. Its totient is φ = 17791488.

The previous prime is 18818083. The next prime is 18818119. The reversal of 18818113 is 31181881.

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 18818113 - 2⁵ = 18818081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18818119) 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, 15745 + ... + 16897.

It is an arithmetic number, because the mean of its divisors is an integer number (2481100).

Almost surely, 2^18818113 is an apocalyptic number.

It is an amenable number.

18818113 is a deficient number, since it is larger than the sum of its proper divisors (1030687).

18818113 is a wasteful number, since it uses less digits than its factorization.

18818113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031.

The product of its digits is 1536, while the sum is 31.

The square root of 18818113 is about 4337.9849008497. The cubic root of 18818113 is about 265.9859462679.

Adding to 18818113 its reverse (31181881), we get a palindrome (49999994).

The spelling of 18818113 in words is "eighteen million, eight hundred eighteen thousand, one hundred thirteen".