18458587858 has 16 divisors (see below), whose sum is σ = 28627421184. Its totient is φ = 8917080480.

The previous prime is 18458587733. The next prime is 18458587867. The reversal of 18458587858 is 85878585481.

It is a junction number, because it is equal to n+sod(n) for n = 18458587793 and 18458587802.

It is an unprimeable number.

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, 203010 + ... + 279517.

It is an arithmetic number, because the mean of its divisors is an integer number (1789213824).

Almost surely, 2^18458587858 is an apocalyptic number.

18458587858 is a deficient number, since it is larger than the sum of its proper divisors (10168833326).

18458587858 is a wasteful number, since it uses less digits than its factorization.

18458587858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483177.

The product of its digits is 114688000, while the sum is 67.

The spelling of 18458587858 in words is "eighteen billion, four hundred fifty-eight million, five hundred eighty-seven thousand, eight hundred fifty-eight".