20123123323133 has 4 divisors (see below), whose sum is σ = 20123150279580. Its totient is φ = 20123096366688.

The previous prime is 20123123323111. The next prime is 20123123323201. The reversal of 20123123323133 is 33132332132102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4752042486724 + 15371080836409 = 2179918^2 + 3920597^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123123323133 - 2¹² = 20123123319037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123123323096 and 20123123323105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123123313133) 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 in 3 ways as a sum of consecutive naturals, for example, 12325610 + ... + 13862427.

It is an arithmetic number, because the mean of its divisors is an integer number (5030787569895).

Almost surely, 2^{20123123323133} is an apocalyptic number.

It is an amenable number.

20123123323133 is a deficient number, since it is larger than the sum of its proper divisors (26956447).

20123123323133 is an equidigital number, since it uses as much as digits as its factorization.

20123123323133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26956446.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 20123123323133 its reverse (33132332132102), we get a palindrome (53255455455235).

The spelling of 20123123323133 in words is "twenty trillion, one hundred twenty-three billion, one hundred twenty-three million, three hundred twenty-three thousand, one hundred thirty-three".