20315636524973 has 2 divisors, whose sum is σ = 20315636524974. Its totient is φ = 20315636524972.

The previous prime is 20315636524961. The next prime is 20315636525059. The reversal of 20315636524973 is 37942563651302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19791803644804 + 523832880169 = 4448798^2 + 723763^2 .

It is a cyclic number.

It is not a de Polignac number, because 20315636524973 - 2¹⁸ = 20315636262829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20315636524933) 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, 10157818262486 + 10157818262487.

It is an arithmetic number, because the mean of its divisors is an integer number (10157818262487).

Almost surely, 2^{20315636524973} is an apocalyptic number.

It is an amenable number.

20315636524973 is a deficient number, since it is larger than the sum of its proper divisors (1).

20315636524973 is an equidigital number, since it uses as much as digits as its factorization.

20315636524973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24494400, while the sum is 56.

The spelling of 20315636524973 in words is "twenty trillion, three hundred fifteen billion, six hundred thirty-six million, five hundred twenty-four thousand, nine hundred seventy-three".