20223563 has 4 divisors (see below), whose sum is σ = 20875968. Its totient is φ = 19571160.

The previous prime is 20223551. The next prime is 20223611. The reversal of 20223563 is 36532202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20223563 - 2⁶ = 20223499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20229563) 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, 326156 + ... + 326217.

It is an arithmetic number, because the mean of its divisors is an integer number (5218992).

Almost surely, 2^20223563 is an apocalyptic number.

20223563 is a deficient number, since it is larger than the sum of its proper divisors (652405).

20223563 is an equidigital number, since it uses as much as digits as its factorization.

20223563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652404.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20223563 is about 4497.0615961981. The cubic root of 20223563 is about 272.4494219178.

Adding to 20223563 its reverse (36532202), we get a palindrome (56755765).

The spelling of 20223563 in words is "twenty million, two hundred twenty-three thousand, five hundred sixty-three".