20353503368399 has 2 divisors, whose sum is σ = 20353503368400. Its totient is φ = 20353503368398.

The previous prime is 20353503368383. The next prime is 20353503368413. The reversal of 20353503368399 is 99386330535302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20353503368399 - 2⁴ = 20353503368383 is a prime.

It is a super-2 number, since 2×20353503368399² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20353503368369) 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, 10176751684199 + 10176751684200.

It is an arithmetic number, because the mean of its divisors is an integer number (10176751684200).

Almost surely, 2^{20353503368399} is an apocalyptic number.

20353503368399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20353503368399 is an equidigital number, since it uses as much as digits as its factorization.

20353503368399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47239200, while the sum is 59.

The spelling of 20353503368399 in words is "twenty trillion, three hundred fifty-three billion, five hundred three million, three hundred sixty-eight thousand, three hundred ninety-nine".