20512224433 has 2 divisors, whose sum is σ = 20512224434. Its totient is φ = 20512224432.

The previous prime is 20512224409. The next prime is 20512224479. The reversal of 20512224433 is 33442221502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16062267169 + 4449957264 = 126737^2 + 66708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20512224433 is a prime.

It is not a weakly prime, because it can be changed into another prime (20512324433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256112216 + 10256112217.

It is an arithmetic number, because the mean of its divisors is an integer number (10256112217).

Almost surely, 2^20512224433 is an apocalyptic number.

It is an amenable number.

20512224433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20512224433 is an equidigital number, since it uses as much as digits as its factorization.

20512224433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 20512224433 its reverse (33442221502), we get a palindrome (53954445935).

The spelling of 20512224433 in words is "twenty billion, five hundred twelve million, two hundred twenty-four thousand, four hundred thirty-three".