20425244 has 12 divisors (see below), whose sum is σ = 40850544. Its totient is φ = 8753664.

The previous prime is 20425243. The next prime is 20425271. The reversal of 20425244 is 44252402.

20425244 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20425243) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 364709 + ... + 364764.

It is an arithmetic number, because the mean of its divisors is an integer number (3404212).

Almost surely, 2^20425244 is an apocalyptic number.

It is an amenable number.

20425244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20425244 is a wasteful number, since it uses less digits than its factorization.

20425244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729484 (or 729482 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 20425244 is about 4519.4296100282. The cubic root of 20425244 is about 273.3521019566.

Adding to 20425244 its reverse (44252402), we get a palindrome (64677646).

The spelling of 20425244 in words is "twenty million, four hundred twenty-five thousand, two hundred forty-four".