20353205423 has 2 divisors, whose sum is σ = 20353205424. Its totient is φ = 20353205422.

The previous prime is 20353205417. The next prime is 20353205491. The reversal of 20353205423 is 32450235302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20353205423 - 2¹² = 20353201327 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20353205413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10176602711 + 10176602712.

It is an arithmetic number, because the mean of its divisors is an integer number (10176602712).

Almost surely, 2^20353205423 is an apocalyptic number.

20353205423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20353205423 is an equidigital number, since it uses as much as digits as its factorization.

20353205423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 29.

The spelling of 20353205423 in words is "twenty billion, three hundred fifty-three million, two hundred five thousand, four hundred twenty-three".