20004525 has 36 divisors (see below), whose sum is σ = 36392512. Its totient is φ = 10501920.

The previous prime is 20004521. The next prime is 20004527. The reversal of 20004525 is 52540002.

It is not a de Polignac number, because 20004525 - 2² = 20004521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20004498 and 20004507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14412 + ... + 15738.

Almost surely, 2^20004525 is an apocalyptic number.

20004525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20004525 is a deficient number, since it is larger than the sum of its proper divisors (16387987).

20004525 is a wasteful number, since it uses less digits than its factorization.

20004525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410 (or 1402 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 20004525 is about 4472.6418367672. The cubic root of 20004525 is about 271.4622313487.

Adding to 20004525 its reverse (52540002), we get a palindrome (72544527).

The spelling of 20004525 in words is "twenty million, four thousand, five hundred twenty-five".