16868690305920 has 192 divisors, whose sum is σ = 58326254990640. Its totient is φ = 4492405186560.

The previous prime is 16868690305871. The next prime is 16868690305937. The reversal of 16868690305920 is 2950309686861.

16868690305920 is a `hidden beast` number, since 1 + 6 + 8 + 6 + 8 + 6 + 9 + 0 + 30 + 592 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

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, 2459187 + ... + 6307533.

Almost surely, 2^{16868690305920} is an apocalyptic number.

16868690305920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16868690305920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29163127495320).

16868690305920 is an abundant number, since it is smaller than the sum of its proper divisors (41457564684720).

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

16868690305920 is a wasteful number, since it uses less digits than its factorization.

16868690305920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849133 (or 3849118 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 63.

The spelling of 16868690305920 in words is "sixteen trillion, eight hundred sixty-eight billion, six hundred ninety million, three hundred five thousand, nine hundred twenty".