20433233 has 2 divisors, whose sum is σ = 20433234. Its totient is φ = 20433232.

The previous prime is 20433229. The next prime is 20433239. The reversal of 20433233 is 33233402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14047504 + 6385729 = 3748^2 + 2527^2 .

It is a cyclic number.

It is not a de Polignac number, because 20433233 - 2² = 20433229 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20433239) 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 as a sum of consecutive naturals, namely, 10216616 + 10216617.

It is an arithmetic number, because the mean of its divisors is an integer number (10216617).

Almost surely, 2^20433233 is an apocalyptic number.

It is an amenable number.

20433233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20433233 is an equidigital number, since it uses as much as digits as its factorization.

20433233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 20.

The square root of 20433233 is about 4520.3133740926. The cubic root of 20433233 is about 273.3877363785.

Adding to 20433233 its reverse (33233402), we get a palindrome (53666635).

The spelling of 20433233 in words is "twenty million, four hundred thirty-three thousand, two hundred thirty-three".