20550563 has 8 divisors (see below), whose sum is σ = 22460976. Its totient is φ = 18647200.

The previous prime is 20550547. The next prime is 20550587. The reversal of 20550563 is 36505502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20550563 - 2⁴ = 20550547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20550463) 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 in 7 ways as a sum of consecutive naturals, for example, 5753 + ... + 8613.

It is an arithmetic number, because the mean of its divisors is an integer number (2807622).

Almost surely, 2^20550563 is an apocalyptic number.

20550563 is a deficient number, since it is larger than the sum of its proper divisors (1910413).

20550563 is a wasteful number, since it uses less digits than its factorization.

20550563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3525.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 20550563 is about 4533.2728794989. The cubic root of 20550563 is about 273.9100127178.

The spelling of 20550563 in words is "twenty million, five hundred fifty thousand, five hundred sixty-three".