20520050312345 has 8 divisors (see below), whose sum is σ = 25473165905160. Its totient is φ = 15849969896320.

The previous prime is 20520050312341. The next prime is 20520050312347. The reversal of 20520050312345 is 54321305002502.

It can be written as a sum of positive squares in 4 ways, for example, as 2017638430096 + 18502411882249 = 1420436^2 + 4301443^2 .

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

It is not a de Polignac number, because 20520050312345 - 2² = 20520050312341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20520050312341) 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, 70758794036 + ... + 70758794325.

It is an arithmetic number, because the mean of its divisors is an integer number (3184145738145).

Almost surely, 2^{20520050312345} is an apocalyptic number.

It is an amenable number.

20520050312345 is a deficient number, since it is larger than the sum of its proper divisors (4953115592815).

20520050312345 is a wasteful number, since it uses less digits than its factorization.

20520050312345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141517588395.

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 20520050312345 its reverse (54321305002502), we get a palindrome (74841355314847).

The spelling of 20520050312345 in words is "twenty trillion, five hundred twenty billion, fifty million, three hundred twelve thousand, three hundred forty-five".