20454225 has 24 divisors (see below), whose sum is σ = 36893472. Its totient is φ = 9916800.

The previous prime is 20454223. The next prime is 20454233. The reversal of 20454225 is 52245402.

It is a happy number.

It is not a de Polignac number, because 20454225 - 2¹ = 20454223 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20454195 and 20454204.

It is not an unprimeable number, because it can be changed into a prime (20454221) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 11572 + ... + 13221.

It is an arithmetic number, because the mean of its divisors is an integer number (1537228).

Almost surely, 2^20454225 is an apocalyptic number.

20454225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20454225 is a deficient number, since it is larger than the sum of its proper divisors (16439247).

20454225 is a wasteful number, since it uses less digits than its factorization.

20454225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24817 (or 24812 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 20454225 is about 4522.6347409447. The cubic root of 20454225 is about 273.4813256013.

Adding to 20454225 its reverse (52245402), we get a palindrome (72699627).

The spelling of 20454225 in words is "twenty million, four hundred fifty-four thousand, two hundred twenty-five".