20313224 has 16 divisors (see below), whose sum is σ = 39401100. Its totient is φ = 9806272.

The previous prime is 20313203. The next prime is 20313229. The reversal of 20313224 is 42231302.

It can be written as a sum of positive squares in 2 ways, for example, as 18576100 + 1737124 = 4310^2 + 1318^2 .

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 3 ways as a sum of consecutive naturals, for example, 43547 + ... + 44010.

Almost surely, 2^20313224 is an apocalyptic number.

It is an amenable number.

20313224 is a deficient number, since it is larger than the sum of its proper divisors (19087876).

20313224 is a wasteful number, since it uses less digits than its factorization.

20313224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87592 (or 87588 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20313224 is about 4507.0194142027. The cubic root of 20313224 is about 272.8514624435.

Adding to 20313224 its reverse (42231302), we get a palindrome (62544526).

The spelling of 20313224 in words is "twenty million, three hundred thirteen thousand, two hundred twenty-four".