20512433 has 2 divisors, whose sum is σ = 20512434. Its totient is φ = 20512432.

The previous prime is 20512411. The next prime is 20512439. The reversal of 20512433 is 33421502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10349089 + 10163344 = 3217^2 + 3188^2 .

It is a cyclic number.

It is not a de Polignac number, because 20512433 - 2¹⁶ = 20446897 is a prime.

It is not a weakly prime, because it can be changed into another prime (20512439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256216 + 10256217.

It is an arithmetic number, because the mean of its divisors is an integer number (10256217).

Almost surely, 2^20512433 is an apocalyptic number.

It is an amenable number.

20512433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20512433 is an equidigital number, since it uses as much as digits as its factorization.

20512433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20512433 is about 4529.0653561193. The cubic root of 20512433 is about 273.7405014670.

Adding to 20512433 its reverse (33421502), we get a palindrome (53933935).

The spelling of 20512433 in words is "twenty million, five hundred twelve thousand, four hundred thirty-three".