20564227128853 has 8 divisors (see below), whose sum is σ = 20690610650496. Its totient is φ = 20437846322400.

The previous prime is 20564227128833. The next prime is 20564227128877. The reversal of 20564227128853 is 35882172246502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20564227128853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20564227128794 and 20564227128803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20564227128833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15730308 + ... + 16987378.

It is an arithmetic number, because the mean of its divisors is an integer number (2586326331312).

Almost surely, 2^{20564227128853} is an apocalyptic number.

It is an amenable number.

20564227128853 is a deficient number, since it is larger than the sum of its proper divisors (126383521643).

20564227128853 is a wasteful number, since it uses less digits than its factorization.

20564227128853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357595.

The product of its (nonzero) digits is 12902400, while the sum is 55.

The spelling of 20564227128853 in words is "twenty trillion, five hundred sixty-four billion, two hundred twenty-seven million, one hundred twenty-eight thousand, eight hundred fifty-three".