20424534451525 has 12 divisors (see below), whose sum is σ = 25346996618944. Its totient is φ = 16326354078000.

The previous prime is 20424534451523. The next prime is 20424534451579. The reversal of 20424534451525 is 52515443542402.

It is not a de Polignac number, because 20424534451525 - 2¹ = 20424534451523 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424534451523) 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 11 ways as a sum of consecutive naturals, for example, 331805691 + ... + 331867240.

Almost surely, 2^{20424534451525} is an apocalyptic number.

20424534451525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20424534451525 is a deficient number, since it is larger than the sum of its proper divisors (4922462167419).

20424534451525 is a wasteful number, since it uses less digits than its factorization.

20424534451525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663674172 (or 663674167 counting only the distinct ones).

The product of its (nonzero) digits is 3840000, while the sum is 46.

Adding to 20424534451525 its reverse (52515443542402), we get a palindrome (72939977993927).

The spelling of 20424534451525 in words is "twenty trillion, four hundred twenty-four billion, five hundred thirty-four million, four hundred fifty-one thousand, five hundred twenty-five".