20550648 has 16 divisors (see below), whose sum is σ = 51376680. Its totient is φ = 6850208.

The previous prime is 20550643. The next prime is 20550659. The reversal of 20550648 is 84605502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550643) 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, 428115 + ... + 428162.

Almost surely, 2^20550648 is an apocalyptic number.

It is an amenable number.

20550648 is an abundant number, since it is smaller than the sum of its proper divisors (30826032).

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

20550648 is a wasteful number, since it uses less digits than its factorization.

20550648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856286 (or 856282 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 20550648 is about 4533.2822546142. The cubic root of 20550648 is about 273.9103903607.

The spelling of 20550648 in words is "twenty million, five hundred fifty thousand, six hundred forty-eight".