20117553364999 has 2 divisors, whose sum is σ = 20117553365000. Its totient is φ = 20117553364998.

The previous prime is 20117553364991. The next prime is 20117553365047. The reversal of 20117553364999 is 99946335571102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20117553364999 - 2³ = 20117553364991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20117553364999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20117553364991) 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, 10058776682499 + 10058776682500.

It is an arithmetic number, because the mean of its divisors is an integer number (10058776682500).

Almost surely, 2^{20117553364999} is an apocalyptic number.

20117553364999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20117553364999 is an equidigital number, since it uses as much as digits as its factorization.

20117553364999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55112400, while the sum is 64.

The spelling of 20117553364999 in words is "twenty trillion, one hundred seventeen billion, five hundred fifty-three million, three hundred sixty-four thousand, nine hundred ninety-nine".