16686850000020 has 24 divisors (see below), whose sum is σ = 46723180000224. Its totient is φ = 4449826666656.

The previous prime is 16686850000019. The next prime is 16686850000033. The reversal of 16686850000020 is 2000005868661.

It is a congruent number.

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, 139057083274 + ... + 139057083393.

It is an arithmetic number, because the mean of its divisors is an integer number (1946799166676).

Almost surely, 2^{16686850000020} is an apocalyptic number.

16686850000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16686850000020 is an abundant number, since it is smaller than the sum of its proper divisors (30036330000204).

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

16686850000020 is a wasteful number, since it uses less digits than its factorization.

16686850000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278114166679 (or 278114166677 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

Adding to 16686850000020 its reverse (2000005868661), we get a palindrome (18686855868681).

The spelling of 16686850000020 in words is "sixteen trillion, six hundred eighty-six billion, eight hundred fifty million, twenty", and thus it is an aban number.