20017525 has 24 divisors (see below), whose sum is σ = 27435744. Its totient is φ = 14366400.

The previous prime is 20017513. The next prime is 20017559. The reversal of 20017525 is 52571002.

It is not a de Polignac number, because 20017525 - 2⁷ = 20017397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20017496 and 20017505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22387 + ... + 23263.

It is an arithmetic number, because the mean of its divisors is an integer number (1143156).

Almost surely, 2^20017525 is an apocalyptic number.

20017525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20017525 is a deficient number, since it is larger than the sum of its proper divisors (7418219).

20017525 is a wasteful number, since it uses less digits than its factorization.

20017525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981 (or 976 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 20017525 is about 4474.0948805317. The cubic root of 20017525 is about 271.5210221279.

Adding to 20017525 its reverse (52571002), we get a palindrome (72588527).

The spelling of 20017525 in words is "twenty million, seventeen thousand, five hundred twenty-five".