16851868367020 has 48 divisors (see below), whose sum is σ = 35777907436320. Its totient is φ = 6667058958336.

The previous prime is 16851868366913. The next prime is 16851868367051. The reversal of 16851868367020 is 2076386815861.

It is a self number, because there is not a number n which added to its sum of digits gives 16851868367020.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11950050 + ... + 13285609.

It is an arithmetic number, because the mean of its divisors is an integer number (745373071590).

Almost surely, 2^{16851868367020} is an apocalyptic number.

16851868367020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16851868367020 is an abundant number, since it is smaller than the sum of its proper divisors (18926039069300).

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

16851868367020 is a wasteful number, since it uses less digits than its factorization.

16851868367020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25236034 (or 25236032 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 61.

The spelling of 16851868367020 in words is "sixteen trillion, eight hundred fifty-one billion, eight hundred sixty-eight million, three hundred sixty-seven thousand, twenty".