20716832979808 has 36 divisors (see below), whose sum is σ = 47445246961812. Its totient is φ = 8878642704960.

The previous prime is 20716832979793. The next prime is 20716832979811. The reversal of 20716832979808 is 80897923861702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6606131398 + ... + 6606134533.

It is an arithmetic number, because the mean of its divisors is an integer number (1317923526717).

Almost surely, 2^{20716832979808} is an apocalyptic number.

20716832979808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20716832979808 is an abundant number, since it is smaller than the sum of its proper divisors (26728413982004).

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

20716832979808 is a wasteful number, since it uses less digits than its factorization.

20716832979808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13212265955 (or 13212265940 counting only the distinct ones).

The product of its (nonzero) digits is 146313216, while the sum is 70.

The spelling of 20716832979808 in words is "twenty trillion, seven hundred sixteen billion, eight hundred thirty-two million, nine hundred seventy-nine thousand, eight hundred eight".