20648244 has 24 divisors (see below), whose sum is σ = 48323520. Its totient is φ = 6862144.

The previous prime is 20648237. The next prime is 20648279. The reversal of 20648244 is 44284602.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1912 + ... + 6704.

It is an arithmetic number, because the mean of its divisors is an integer number (2013480).

Almost surely, 2^20648244 is an apocalyptic number.

It is an amenable number.

20648244 is an abundant number, since it is smaller than the sum of its proper divisors (27675276).

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

20648244 is a wasteful number, since it uses less digits than its factorization.

20648244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5159 (or 5157 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 20648244 is about 4544.0338907187. The cubic root of 20648244 is about 274.3433102325.

The spelling of 20648244 in words is "twenty million, six hundred forty-eight thousand, two hundred forty-four".