520345430020043 has 4 divisors (see below), whose sum is σ = 520361645746920. Its totient is φ = 520329214293168.

The previous prime is 520345430019937. The next prime is 520345430020049. The reversal of 520345430020043 is 340020034543025.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 520345430020043 - 2²² = 520345425825739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520345430019985 and 520345430020012.

It is not an unprimeable number, because it can be changed into a prime (520345430020049) 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, 8107815305 + ... + 8107879482.

It is an arithmetic number, because the mean of its divisors is an integer number (130090411436730).

Almost surely, 2^{520345430020043} is an apocalyptic number.

520345430020043 is a deficient number, since it is larger than the sum of its proper divisors (16215726877).

520345430020043 is a wasteful number, since it uses less digits than its factorization.

520345430020043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16215726876.

The product of its (nonzero) digits is 172800, while the sum is 35.

Adding to 520345430020043 its reverse (340020034543025), we get a palindrome (860365464563068).

The spelling of 520345430020043 in words is "five hundred twenty trillion, three hundred forty-five billion, four hundred thirty million, twenty thousand, forty-three".