20313233 has 4 divisors (see below), whose sum is σ = 20350260. Its totient is φ = 20276208.

The previous prime is 20313229. The next prime is 20313247. The reversal of 20313233 is 33231302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4048144 + 16265089 = 2012^2 + 4033^2 .

It is a cyclic number.

It is not a de Polignac number, because 20313233 - 2² = 20313229 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20313203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17678 + ... + 18791.

It is an arithmetic number, because the mean of its divisors is an integer number (5087565).

Almost surely, 2^20313233 is an apocalyptic number.

It is an amenable number.

20313233 is a deficient number, since it is larger than the sum of its proper divisors (37027).

20313233 is an equidigital number, since it uses as much as digits as its factorization.

20313233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37026.

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 20313233 is about 4507.0204126451. The cubic root of 20313233 is about 272.8515027401.

Adding to 20313233 its reverse (33231302), we get a palindrome (53544535).

The spelling of 20313233 in words is "twenty million, three hundred thirteen thousand, two hundred thirty-three".