20448556 has 12 divisors (see below), whose sum is σ = 36120168. Its totient is φ = 10128512.

The previous prime is 20448553. The next prime is 20448581. The reversal of 20448556 is 65584402.

It is not an unprimeable number, because it can be changed into a prime (20448553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23461 + ... + 24316.

It is an arithmetic number, because the mean of its divisors is an integer number (3010014).

Almost surely, 2^20448556 is an apocalyptic number.

It is an amenable number.

20448556 is a deficient number, since it is larger than the sum of its proper divisors (15671612).

20448556 is a wasteful number, since it uses less digits than its factorization.

20448556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47888 (or 47886 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 20448556 is about 4522.0079610722. The cubic root of 20448556 is about 273.4560576532.

The spelling of 20448556 in words is "twenty million, four hundred forty-eight thousand, five hundred fifty-six".