18708556456858 has 16 divisors (see below), whose sum is σ = 28067732320320. Its totient is φ = 9352645848000.

The previous prime is 18708556456817. The next prime is 18708556456867. The reversal of 18708556456858 is 85865465580781.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332811058 + ... + 332867266.

It is an arithmetic number, because the mean of its divisors is an integer number (1754233270020).

Almost surely, 2^{18708556456858} is an apocalyptic number.

18708556456858 is a deficient number, since it is larger than the sum of its proper divisors (9359175863462).

18708556456858 is a wasteful number, since it uses less digits than its factorization.

18708556456858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82293.

The product of its (nonzero) digits is 2580480000, while the sum is 76.

The spelling of 18708556456858 in words is "eighteen trillion, seven hundred eight billion, five hundred fifty-six million, four hundred fifty-six thousand, eight hundred fifty-eight".