20576648 has 8 divisors (see below), whose sum is σ = 38581230. Its totient is φ = 10288320.

The previous prime is 20576641. The next prime is 20576657. The reversal of 20576648 is 84667502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20448484 + 128164 = 4522^2 + 358^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20576641) by changing a digit.

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, 1286033 + ... + 1286048.

Almost surely, 2^20576648 is an apocalyptic number.

It is an amenable number.

20576648 is a deficient number, since it is larger than the sum of its proper divisors (18004582).

20576648 is a wasteful number, since it uses less digits than its factorization.

20576648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572087 (or 2572083 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 20576648 is about 4536.1490275343. The cubic root of 20576648 is about 274.0258558015.

The spelling of 20576648 in words is "twenty million, five hundred seventy-six thousand, six hundred forty-eight".