18812408818 has 16 divisors (see below), whose sum is σ = 32281704000. Its totient is φ = 8054495856.

The previous prime is 18812408809. The next prime is 18812408819. The reversal of 18812408818 is 81880421881.

It is not an unprimeable number, because it can be changed into a prime (18812408819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649068 + ... + 677431.

It is an arithmetic number, because the mean of its divisors is an integer number (2017606500).

Almost surely, 2^18812408818 is an apocalyptic number.

18812408818 is a deficient number, since it is larger than the sum of its proper divisors (13469295182).

18812408818 is a wasteful number, since it uses less digits than its factorization.

18812408818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327521.

The product of its (nonzero) digits is 262144, while the sum is 49.

The spelling of 18812408818 in words is "eighteen billion, eight hundred twelve million, four hundred eight thousand, eight hundred eighteen".