20434452355234 has 4 divisors (see below), whose sum is σ = 30651678532854. Its totient is φ = 10217226177616.

The previous prime is 20434452355123. The next prime is 20434452355279. The reversal of 20434452355234 is 43255325443402.

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

It can be written as a sum of positive squares in only one way, i.e., 15012889374609 + 5421562980625 = 3874647^2 + 2328425^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5108613088807 + ... + 5108613088810.

Almost surely, 2^{20434452355234} is an apocalyptic number.

20434452355234 is a deficient number, since it is larger than the sum of its proper divisors (10217226177620).

20434452355234 is a wasteful number, since it uses less digits than its factorization.

20434452355234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10217226177619.

The product of its (nonzero) digits is 6912000, while the sum is 46.

Adding to 20434452355234 its reverse (43255325443402), we get a palindrome (63689777798636).

The spelling of 20434452355234 in words is "twenty trillion, four hundred thirty-four billion, four hundred fifty-two million, three hundred fifty-five thousand, two hundred thirty-four".