20775877056 has 112 divisors (see below), whose sum is σ = 66629767680. Its totient is φ = 6295714560.

The previous prime is 20775877051. The next prime is 20775877061. The reversal of 20775877056 is 65077857702.

20775877056 is a `hidden beast` number, since 2 + 0 + 7 + 7 + 587 + 7 + 0 + 56 = 666.

It is an interprime number because it is at equal distance from previous prime (20775877051) and next prime (20775877061).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 20775876993 and 20775877011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20775877051) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 527496 + ... + 565511.

It is an arithmetic number, because the mean of its divisors is an integer number (594908640).

Almost surely, 2^20775877056 is an apocalyptic number.

It is an amenable number.

20775877056 is an abundant number, since it is smaller than the sum of its proper divisors (45853890624).

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

20775877056 is a wasteful number, since it uses less digits than its factorization.

20775877056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093039 (or 1093023 counting only the distinct ones).

The product of its (nonzero) digits is 5762400, while the sum is 54.

The spelling of 20775877056 in words is "twenty billion, seven hundred seventy-five million, eight hundred seventy-seven thousand, fifty-six".