20575956823 has 2 divisors, whose sum is σ = 20575956824. Its totient is φ = 20575956822.

The previous prime is 20575956799. The next prime is 20575956827. The reversal of 20575956823 is 32865957502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20575956823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20575956827) by changing a digit.

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 as a sum of consecutive naturals, namely, 10287978411 + 10287978412.

It is an arithmetic number, because the mean of its divisors is an integer number (10287978412).

Almost surely, 2^20575956823 is an apocalyptic number.

20575956823 is a deficient number, since it is larger than the sum of its proper divisors (1).

20575956823 is an equidigital number, since it uses as much as digits as its factorization.

20575956823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536000, while the sum is 52.

The spelling of 20575956823 in words is "twenty billion, five hundred seventy-five million, nine hundred fifty-six thousand, eight hundred twenty-three".