20112305212523 has 8 divisors (see below), whose sum is σ = 20158806696096. Its totient is φ = 20065838140800.

The previous prime is 20112305212511. The next prime is 20112305212543. The reversal of 20112305212523 is 32521250321102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20112305212523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112305212543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7432511 + ... + 9770712.

It is an arithmetic number, because the mean of its divisors is an integer number (2519850837012).

Almost surely, 2^{20112305212523} is an apocalyptic number.

20112305212523 is a deficient number, since it is larger than the sum of its proper divisors (46501483573).

20112305212523 is a wasteful number, since it uses less digits than its factorization.

20112305212523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17205925.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 20112305212523 its reverse (32521250321102), we get a palindrome (52633555533625).

The spelling of 20112305212523 in words is "twenty trillion, one hundred twelve billion, three hundred five million, two hundred twelve thousand, five hundred twenty-three".