20779916712 has 32 divisors (see below), whose sum is σ = 52073213280. Its totient is φ = 6910182720.

The previous prime is 20779916669. The next prime is 20779916741. The reversal of 20779916712 is 21761997702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1018198 + ... + 1038405.

It is an arithmetic number, because the mean of its divisors is an integer number (1627287915).

Almost surely, 2^20779916712 is an apocalyptic number.

It is an amenable number.

20779916712 is an abundant number, since it is smaller than the sum of its proper divisors (31293296568).

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

20779916712 is a wasteful number, since it uses less digits than its factorization.

20779916712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057033 (or 2057029 counting only the distinct ones).

The product of its (nonzero) digits is 666792, while the sum is 51.

The spelling of 20779916712 in words is "twenty billion, seven hundred seventy-nine million, nine hundred sixteen thousand, seven hundred twelve".