18818643115 has 8 divisors (see below), whose sum is σ = 22583277360. Its totient is φ = 15054310752.

The previous prime is 18818643113. The next prime is 18818643169. The reversal of 18818643115 is 51134681881.

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 18818643115 - 2¹ = 18818643113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18818643113) 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, 97876 + ... + 217294.

It is an arithmetic number, because the mean of its divisors is an integer number (2822909670).

Almost surely, 2^18818643115 is an apocalyptic number.

18818643115 is a deficient number, since it is larger than the sum of its proper divisors (3764634245).

18818643115 is a wasteful number, since it uses less digits than its factorization.

18818643115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150941.

The product of its digits is 184320, while the sum is 46.

The spelling of 18818643115 in words is "eighteen billion, eight hundred eighteen million, six hundred forty-three thousand, one hundred fifteen".