18818954858 has 32 divisors (see below), whose sum is σ = 31304560320. Its totient is φ = 8413580160.

The previous prime is 18818954801. The next prime is 18818954879. The reversal of 18818954858 is 85845981881.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18818954794 and 18818954803.

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 15 ways as a sum of consecutive naturals, for example, 299885 + ... + 357167.

It is an arithmetic number, because the mean of its divisors is an integer number (978267510).

Almost surely, 2^18818954858 is an apocalyptic number.

18818954858 is a deficient number, since it is larger than the sum of its proper divisors (12485605462).

18818954858 is a wasteful number, since it uses less digits than its factorization.

18818954858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57542.

The product of its digits is 29491200, while the sum is 65.

The spelling of 18818954858 in words is "eighteen billion, eight hundred eighteen million, nine hundred fifty-four thousand, eight hundred fifty-eight".