20433263 has 2 divisors, whose sum is σ = 20433264. Its totient is φ = 20433262.

The previous prime is 20433241. The next prime is 20433289. The reversal of 20433263 is 36233402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20433263 - 2¹⁶ = 20367727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20433233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216631 + 10216632.

It is an arithmetic number, because the mean of its divisors is an integer number (10216632).

Almost surely, 2^20433263 is an apocalyptic number.

20433263 is a deficient number, since it is larger than the sum of its proper divisors (1).

20433263 is an equidigital number, since it uses as much as digits as its factorization.

20433263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 20433263 is about 4520.3166924453. The cubic root of 20433263 is about 273.3878701741.

Adding to 20433263 its reverse (36233402), we get a palindrome (56666665).

The spelling of 20433263 in words is "twenty million, four hundred thirty-three thousand, two hundred sixty-three".