18557411050020 has 48 divisors (see below), whose sum is σ = 52692592514688. Its totient is φ = 4878943749120.

The previous prime is 18557411049997. The next prime is 18557411050051. The reversal of 18557411050020 is 2005011475581.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2178095629 + ... + 2178104148.

It is an arithmetic number, because the mean of its divisors is an integer number (1097762344056).

Almost surely, 2^{18557411050020} is an apocalyptic number.

18557411050020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18557411050020 is an abundant number, since it is smaller than the sum of its proper divisors (34135181464668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18557411050020 is a wasteful number, since it uses less digits than its factorization.

18557411050020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4356199860 (or 4356199858 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 39.

The spelling of 18557411050020 in words is "eighteen trillion, five hundred fifty-seven billion, four hundred eleven million, fifty thousand, twenty".