20323563 has 16 divisors (see below), whose sum is σ = 29863680. Its totient is φ = 12214944.

The previous prime is 20323561. The next prime is 20323601. The reversal of 20323563 is 36532302.

It is not a de Polignac number, because 20323563 - 2¹ = 20323561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20323561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4383 + ... + 7736.

It is an arithmetic number, because the mean of its divisors is an integer number (1866480).

Almost surely, 2^20323563 is an apocalyptic number.

20323563 is a deficient number, since it is larger than the sum of its proper divisors (9540117).

20323563 is a wasteful number, since it uses less digits than its factorization.

20323563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12178.

The product of its (nonzero) digits is 3240, while the sum is 24.

The square root of 20323563 is about 4508.1662569164. The cubic root of 20323563 is about 272.8977464601.

Adding to 20323563 its reverse (36532302), we get a palindrome (56855865).

The spelling of 20323563 in words is "twenty million, three hundred twenty-three thousand, five hundred sixty-three".