18618903032889 has 16 divisors (see below), whose sum is σ = 25066750205952. Its totient is φ = 12291833987088.

The previous prime is 18618903032861. The next prime is 18618903032909. The reversal of 18618903032889 is 98823030981681.

It is a happy number.

It is not a de Polignac number, because 18618903032889 - 2²⁹ = 18618366161977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18618903012889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14759782 + ... + 15971504.

It is an arithmetic number, because the mean of its divisors is an integer number (1566671887872).

Almost surely, 2^{18618903032889} is an apocalyptic number.

It is an amenable number.

18618903032889 is a deficient number, since it is larger than the sum of its proper divisors (6447847173063).

18618903032889 is a wasteful number, since it uses less digits than its factorization.

18618903032889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261556.

The product of its (nonzero) digits is 35831808, while the sum is 66.

The spelling of 18618903032889 in words is "eighteen trillion, six hundred eighteen billion, nine hundred three million, thirty-two thousand, eight hundred eighty-nine".