20665048 has 8 divisors (see below), whose sum is σ = 38746980. Its totient is φ = 10332520.

The previous prime is 20665039. The next prime is 20665067. The reversal of 20665048 is 84056602.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1291558 + ... + 1291573.

Almost surely, 2^20665048 is an apocalyptic number.

It is an amenable number.

20665048 is a deficient number, since it is larger than the sum of its proper divisors (18081932).

20665048 is a wasteful number, since it uses less digits than its factorization.

20665048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583137 (or 2583133 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 20665048 is about 4545.8825325782. The cubic root of 20665048 is about 274.4177122811.

The spelling of 20665048 in words is "twenty million, six hundred sixty-five thousand, forty-eight".