20353251555353 has 2 divisors, whose sum is σ = 20353251555354. Its totient is φ = 20353251555352.

The previous prime is 20353251555271. The next prime is 20353251555467. The reversal of 20353251555353 is 35355515235302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17174832928009 + 3178418627344 = 4144253^2 + 1782812^2 .

It is a cyclic number.

It is not a de Polignac number, because 20353251555353 - 2⁸ = 20353251555097 is a prime.

It is a super-3 number, since 3×20353251555353³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20353251555298 and 20353251555307.

It is not a weakly prime, because it can be changed into another prime (20353251555053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10176625777676 + 10176625777677.

It is an arithmetic number, because the mean of its divisors is an integer number (10176625777677).

Almost surely, 2^{20353251555353} is an apocalyptic number.

It is an amenable number.

20353251555353 is a deficient number, since it is larger than the sum of its proper divisors (1).

20353251555353 is an equidigital number, since it uses as much as digits as its factorization.

20353251555353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5062500, while the sum is 47.

The spelling of 20353251555353 in words is "twenty trillion, three hundred fifty-three billion, two hundred fifty-one million, five hundred fifty-five thousand, three hundred fifty-three".