20813524838263 has 2 divisors, whose sum is σ = 20813524838264. Its totient is φ = 20813524838262.

The previous prime is 20813524838233. The next prime is 20813524838269. The reversal of 20813524838263 is 36283842531802.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20813524838263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20813524838269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10406762419131 + 10406762419132.

It is an arithmetic number, because the mean of its divisors is an integer number (10406762419132).

Almost surely, 2^{20813524838263} is an apocalyptic number.

20813524838263 is a deficient number, since it is larger than the sum of its proper divisors (1).

20813524838263 is an equidigital number, since it uses as much as digits as its factorization.

20813524838263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13271040, while the sum is 55.

The spelling of 20813524838263 in words is "twenty trillion, eight hundred thirteen billion, five hundred twenty-four million, eight hundred thirty-eight thousand, two hundred sixty-three".