20755720777056 has 48 divisors (see below), whose sum is σ = 55511762657904. Its totient is φ = 6788034466304.

The previous prime is 20755720777027. The next prime is 20755720777093. The reversal of 20755720777056 is 65077702755702.

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

It is a super-3 number, since 3×20755720777056³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2039668731 + ... + 2039678906.

It is an arithmetic number, because the mean of its divisors is an integer number (1156495055373).

Almost surely, 2^{20755720777056} is an apocalyptic number.

It is an amenable number.

20755720777056 is an abundant number, since it is smaller than the sum of its proper divisors (34756041880848).

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

20755720777056 is a wasteful number, since it uses less digits than its factorization.

20755720777056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4079347703 (or 4079347695 counting only the distinct ones).

The product of its (nonzero) digits is 50421000, while the sum is 60.

The spelling of 20755720777056 in words is "twenty trillion, seven hundred fifty-five billion, seven hundred twenty million, seven hundred seventy-seven thousand, fifty-six".