20353123263256 has 96 divisors (see below), whose sum is σ = 45238024896480. Its totient is φ = 8409227904000.

The previous prime is 20353123263217. The next prime is 20353123263257. The reversal of 20353123263256 is 65236232135302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20353123263257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30803556 + ... + 31457356.

It is an arithmetic number, because the mean of its divisors is an integer number (471229426005).

Almost surely, 2^{20353123263256} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20353123263256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22619012448240).

20353123263256 is an abundant number, since it is smaller than the sum of its proper divisors (24884901633224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20353123263256 is a wasteful number, since it uses less digits than its factorization.

20353123263256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654533 (or 654500 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 43.

Adding to 20353123263256 its reverse (65236232135302), we get a palindrome (85589355398558).

The spelling of 20353123263256 in words is "twenty trillion, three hundred fifty-three billion, one hundred twenty-three million, two hundred sixty-three thousand, two hundred fifty-six".