20353503368369 has 2 divisors, whose sum is σ = 20353503368370. Its totient is φ = 20353503368368.

The previous prime is 20353503368293. The next prime is 20353503368383. The reversal of 20353503368369 is 96386330535302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19103132128369 + 1250371240000 = 4370713^2 + 1118200^2 .

It is a cyclic number.

It is not a de Polignac number, because 20353503368369 - 2²⁴ = 20353486591153 is a prime.

It is a super-2 number, since 2×20353503368369² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20353503368399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10176751684184 + 10176751684185.

It is an arithmetic number, because the mean of its divisors is an integer number (10176751684185).

Almost surely, 2^{20353503368369} is an apocalyptic number.

It is an amenable number.

20353503368369 is a deficient number, since it is larger than the sum of its proper divisors (1).

20353503368369 is an equidigital number, since it uses as much as digits as its factorization.

20353503368369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31492800, while the sum is 56.

The spelling of 20353503368369 in words is "twenty trillion, three hundred fifty-three billion, five hundred three million, three hundred sixty-eight thousand, three hundred sixty-nine".