18501668516850 has 48 divisors (see below), whose sum is σ = 47124249771648. Its totient is φ = 4800432911040.

The previous prime is 18501668516797. The next prime is 18501668516867. The reversal of 18501668516850 is 5861586610581.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1666811434 + ... + 1666822533.

It is an arithmetic number, because the mean of its divisors is an integer number (981755203576).

Almost surely, 2^{18501668516850} is an apocalyptic number.

18501668516850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18501668516850 is an abundant number, since it is smaller than the sum of its proper divisors (28622581254798).

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

18501668516850 is a wasteful number, since it uses less digits than its factorization.

18501668516850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333634019 (or 3333634014 counting only the distinct ones).

The product of its (nonzero) digits is 13824000, while the sum is 60.

The spelling of 18501668516850 in words is "eighteen trillion, five hundred one billion, six hundred sixty-eight million, five hundred sixteen thousand, eight hundred fifty".