20907525 has 12 divisors (see below), whose sum is σ = 34567232. Its totient is φ = 11150640.

The previous prime is 20907517. The next prime is 20907571. The reversal of 20907525 is 52570902.

It is a happy number.

It is not a de Polignac number, because 20907525 - 2³ = 20907517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20907492 and 20907501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139309 + ... + 139458.

Almost surely, 2^20907525 is an apocalyptic number.

20907525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20907525 is a deficient number, since it is larger than the sum of its proper divisors (13659707).

20907525 is a wasteful number, since it uses less digits than its factorization.

20907525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278780 (or 278775 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 20907525 is about 4572.4747128880. The cubic root of 20907525 is about 275.4868510846.

The spelling of 20907525 in words is "twenty million, nine hundred seven thousand, five hundred twenty-five".