20577520572256 has 12 divisors (see below), whose sum is σ = 40511993626692. Its totient is φ = 10288760286112.

The previous prime is 20577520572253. The next prime is 20577520572283. The reversal of 20577520572256 is 65227502577502.

It is a junction number, because it is equal to n+sod(n) for n = 20577520572197 and 20577520572206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20577520572253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321523758910 + ... + 321523758973.

It is an arithmetic number, because the mean of its divisors is an integer number (3375999468891).

Almost surely, 2^{20577520572256} is an apocalyptic number.

It is an amenable number.

20577520572256 is a deficient number, since it is larger than the sum of its proper divisors (19934473054436).

20577520572256 is an equidigital number, since it uses as much as digits as its factorization.

20577520572256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643047517893 (or 643047517885 counting only the distinct ones).

The product of its (nonzero) digits is 20580000, while the sum is 55.

The spelling of 20577520572256 in words is "twenty trillion, five hundred seventy-seven billion, five hundred twenty million, five hundred seventy-two thousand, two hundred fifty-six".