20434323005523 has 12 divisors (see below), whose sum is σ = 33732850675888. Its totient is φ = 11676756003120.

The previous prime is 20434323005489. The next prime is 20434323005527. The reversal of 20434323005523 is 32550032343402.

It is a happy number.

20434323005523 is a `hidden beast` number, since 2 + 0 + 4 + 343 + 2 + 300 + 5 + 5 + 2 + 3 = 666.

It is not a de Polignac number, because 20434323005523 - 2¹⁸ = 20434322743379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20434323005527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162177166648 + ... + 162177166773.

Almost surely, 2^{20434323005523} is an apocalyptic number.

20434323005523 is a deficient number, since it is larger than the sum of its proper divisors (13298527670365).

20434323005523 is a wasteful number, since it uses less digits than its factorization.

20434323005523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324354333434 (or 324354333431 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 36.

Adding to 20434323005523 its reverse (32550032343402), we get a palindrome (52984355348925).

The spelling of 20434323005523 in words is "twenty trillion, four hundred thirty-four billion, three hundred twenty-three million, five thousand, five hundred twenty-three".