20448925 has 18 divisors (see below), whose sum is σ = 29498298. Its totient is φ = 14021280.

The previous prime is 20448917. The next prime is 20448941. The reversal of 20448925 is 52984402.

It can be written as a sum of positive squares in 3 ways, for example, as 441 + 20448484 = 21^2 + 4522^2 .

It is not a de Polignac number, because 20448925 - 2³ = 20448917 is a prime.

It is a Duffinian number.

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 17 ways as a sum of consecutive naturals, for example, 7122 + ... + 9571.

Almost surely, 2^20448925 is an apocalyptic number.

20448925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20448925 is a deficient number, since it is larger than the sum of its proper divisors (9049373).

20448925 is a wasteful number, since it uses less digits than its factorization.

20448925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16717 (or 16705 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 20448925 is about 4522.0487613470. The cubic root of 20448925 is about 273.4577025073.

The spelling of 20448925 in words is "twenty million, four hundred forty-eight thousand, nine hundred twenty-five".