18556483703885 has 4 divisors (see below), whose sum is σ = 22267780444668. Its totient is φ = 14845186963104.

The previous prime is 18556483703851. The next prime is 18556483703887. The reversal of 18556483703885 is 58830738465581.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12038256005161 + 6518227698724 = 3469619^2 + 2553082^2 .

It is a cyclic number.

It is not a de Polignac number, because 18556483703885 - 2³² = 18552188736589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18556483703887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1855648370384 + ... + 1855648370393.

It is an arithmetic number, because the mean of its divisors is an integer number (5566945111167).

Almost surely, 2^{18556483703885} is an apocalyptic number.

It is an amenable number.

18556483703885 is a deficient number, since it is larger than the sum of its proper divisors (3711296740783).

18556483703885 is an equidigital number, since it uses as much as digits as its factorization.

18556483703885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711296740782.

The product of its (nonzero) digits is 774144000, while the sum is 71.

The spelling of 18556483703885 in words is "eighteen trillion, five hundred fifty-six billion, four hundred eighty-three million, seven hundred three thousand, eight hundred eighty-five".