16920798693408 has 48 divisors (see below), whose sum is σ = 49352329524960. Its totient is φ = 5640266230848.

The previous prime is 16920798693401. The next prime is 16920798693467. The reversal of 16920798693408 is 80439689702961.

16920798693408 is a `hidden beast` number, since 1 + 6 + 9 + 207 + 9 + 8 + 6 + 9 + 3 + 408 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (16920798693401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9792128010 + ... + 9792129737.

It is an arithmetic number, because the mean of its divisors is an integer number (1028173531770).

Almost surely, 2^{16920798693408} is an apocalyptic number.

16920798693408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16920798693408 is an abundant number, since it is smaller than the sum of its proper divisors (32431530831552).

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

16920798693408 is a wasteful number, since it uses less digits than its factorization.

16920798693408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19584257766 (or 19584257752 counting only the distinct ones).

The product of its (nonzero) digits is 282175488, while the sum is 72.

The spelling of 16920798693408 in words is "sixteen trillion, nine hundred twenty billion, seven hundred ninety-eight million, six hundred ninety-three thousand, four hundred eight".