20448224 has 12 divisors (see below), whose sum is σ = 40257504. Its totient is φ = 10224096.

The previous prime is 20448223. The next prime is 20448227. The reversal of 20448224 is 42284402.

It is a junction number, because it is equal to n+sod(n) for n = 20448193 and 20448202.

It is a congruent 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 as a sum of consecutive naturals, namely, 319472 + ... + 319535.

It is an arithmetic number, because the mean of its divisors is an integer number (3354792).

Almost surely, 2^20448224 is an apocalyptic number.

It is an amenable number.

20448224 is a deficient number, since it is larger than the sum of its proper divisors (19809280).

20448224 is an equidigital number, since it uses as much as digits as its factorization.

20448224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639017 (or 639009 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

The square root of 20448224 is about 4521.9712515672. The cubic root of 20448224 is about 273.4545777132.

The spelling of 20448224 in words is "twenty million, four hundred forty-eight thousand, two hundred twenty-four".