20043721204525 has 24 divisors (see below), whose sum is σ = 26166534783200. Its totient is φ = 15188589806400.

The previous prime is 20043721204517. The next prime is 20043721204561. The reversal of 20043721204525 is 52540212734002.

It is not a de Polignac number, because 20043721204525 - 2³ = 20043721204517 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 428391 + ... + 6345940.

Almost surely, 2^{20043721204525} is an apocalyptic number.

20043721204525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20043721204525 is a deficient number, since it is larger than the sum of its proper divisors (6122813578675).

20043721204525 is a wasteful number, since it uses less digits than its factorization.

20043721204525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6780589 (or 6780584 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 37.

Adding to 20043721204525 its reverse (52540212734002), we get a palindrome (72583933938527).

The spelling of 20043721204525 in words is "twenty trillion, forty-three billion, seven hundred twenty-one million, two hundred four thousand, five hundred twenty-five".