20312223 has 16 divisors (see below), whose sum is σ = 28717056. Its totient is φ = 12748320.

The previous prime is 20312221. The next prime is 20312233. The reversal of 20312223 is 32221302.

It is not a de Polignac number, because 20312223 - 2¹ = 20312221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312221) 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, 490 + ... + 6392.

It is an arithmetic number, because the mean of its divisors is an integer number (1794816).

Almost surely, 2^20312223 is an apocalyptic number.

20312223 is a deficient number, since it is larger than the sum of its proper divisors (8404833).

20312223 is a wasteful number, since it uses less digits than its factorization.

20312223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5974.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20312223 is about 4506.9083638343. The cubic root of 20312223 is about 272.8469804896.

Adding to 20312223 its reverse (32221302), we get a palindrome (52533525).

The spelling of 20312223 in words is "twenty million, three hundred twelve thousand, two hundred twenty-three".