20501425452434 has 16 divisors (see below), whose sum is σ = 30818333621400. Its totient is φ = 10228662457344.

The previous prime is 20501425452413. The next prime is 20501425452449. The reversal of 20501425452434 is 43425452410502.

It can be written as a sum of positive squares in 4 ways, for example, as 20061396210025 + 440029242409 = 4478995^2 + 663347^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20501425452391 and 20501425452400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961289 + ... + 6475100.

Almost surely, 2^{20501425452434} is an apocalyptic number.

20501425452434 is a deficient number, since it is larger than the sum of its proper divisors (10316908168966).

20501425452434 is a wasteful number, since it uses less digits than its factorization.

20501425452434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7439357.

The product of its (nonzero) digits is 768000, while the sum is 41.

Adding to 20501425452434 its reverse (43425452410502), we get a palindrome (63926877862936).

The spelling of 20501425452434 in words is "twenty trillion, five hundred one billion, four hundred twenty-five million, four hundred fifty-two thousand, four hundred thirty-four".