20520434100534 has 64 divisors (see below), whose sum is σ = 42848096256000. Its totient is φ = 6544373260320.

The previous prime is 20520434100533. The next prime is 20520434100559. The reversal of 20520434100534 is 43500143402502.

It is a junction number, because it is equal to n+sod(n) for n = 20520434100495 and 20520434100504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20520434100533) 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 31 ways as a sum of consecutive naturals, for example, 4518637 + ... + 7839575.

It is an arithmetic number, because the mean of its divisors is an integer number (669501504000).

Almost surely, 2^{20520434100534} is an apocalyptic number.

20520434100534 is an abundant number, since it is smaller than the sum of its proper divisors (22327662155466).

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

20520434100534 is a wasteful number, since it uses less digits than its factorization.

20520434100534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3321353.

The product of its (nonzero) digits is 57600, while the sum is 33.

The spelling of 20520434100534 in words is "twenty trillion, five hundred twenty billion, four hundred thirty-four million, one hundred thousand, five hundred thirty-four".