20313223 has 16 divisors (see below), whose sum is σ = 24613120. Its totient is φ = 16376256.

The previous prime is 20313203. The next prime is 20313229. The reversal of 20313223 is 32231302.

It is a cyclic number.

It is not a de Polignac number, because 20313223 - 2²¹ = 18216071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20313197 and 20313206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313229) 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, 21211 + ... + 22147.

It is an arithmetic number, because the mean of its divisors is an integer number (1538320).

Almost surely, 2^20313223 is an apocalyptic number.

20313223 is a deficient number, since it is larger than the sum of its proper divisors (4299897).

20313223 is a wasteful number, since it uses less digits than its factorization.

20313223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20313223 is about 4507.0193032646. The cubic root of 20313223 is about 272.8514579661.

Adding to 20313223 its reverse (32231302), we get a palindrome (52544525).

The spelling of 20313223 in words is "twenty million, three hundred thirteen thousand, two hundred twenty-three".