20489648 has 10 divisors (see below), whose sum is σ = 39698724. Its totient is φ = 10244816.

The previous prime is 20489647. The next prime is 20489653. The reversal of 20489648 is 84698402.

It is not an unprimeable number, because it can be changed into a prime (20489647) 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 as a sum of consecutive naturals, namely, 640286 + ... + 640317.

Almost surely, 2^20489648 is an apocalyptic number.

It is an amenable number.

20489648 is a deficient number, since it is larger than the sum of its proper divisors (19209076).

20489648 is a wasteful number, since it uses less digits than its factorization.

20489648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280611 (or 1280605 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 20489648 is about 4526.5492375539. The cubic root of 20489648 is about 273.6391078691.

The spelling of 20489648 in words is "twenty million, four hundred eighty-nine thousand, six hundred forty-eight".