20424233 has 4 divisors (see below), whose sum is σ = 20474580. Its totient is φ = 20373888.

The previous prime is 20424199. The next prime is 20424247. The reversal of 20424233 is 33242402.

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 12054784 + 8369449 = 3472^2 + 2893^2 .

It is a cyclic number.

It is not a de Polignac number, because 20424233 - 2⁶ = 20424169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20424263) 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, 24560 + ... + 25377.

It is an arithmetic number, because the mean of its divisors is an integer number (5118645).

Almost surely, 2^20424233 is an apocalyptic number.

It is an amenable number.

20424233 is a deficient number, since it is larger than the sum of its proper divisors (50347).

20424233 is an equidigital number, since it uses as much as digits as its factorization.

20424233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50346.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 20424233 is about 4519.3177582463. The cubic root of 20424233 is about 273.3475917937.

Adding to 20424233 its reverse (33242402), we get a palindrome (53666635).

The spelling of 20424233 in words is "twenty million, four hundred twenty-four thousand, two hundred thirty-three".