20448225 has 36 divisors (see below), whose sum is σ = 41860416. Its totient is φ = 9347040.

The previous prime is 20448223. The next prime is 20448227. The reversal of 20448225 is 52284402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20448223) and next prime (20448227).

It is not a de Polignac number, because 20448225 - 2¹ = 20448223 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20448223) 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, 4917 + ... + 8066.

Almost surely, 2^20448225 is an apocalyptic number.

20448225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20448225 is an abundant number, since it is smaller than the sum of its proper divisors (21412191).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20448225 is a wasteful number, since it uses less digits than its factorization.

20448225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13006 (or 12998 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 20448225 is about 4521.9713621384. The cubic root of 20448225 is about 273.4545821709.

The spelling of 20448225 in words is "twenty million, four hundred forty-eight thousand, two hundred twenty-five".