20446580533 has 2 divisors, whose sum is σ = 20446580534. Its totient is φ = 20446580532.

The previous prime is 20446580521. The next prime is 20446580569. The reversal of 20446580533 is 33508564402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16795641604 + 3650938929 = 129598^2 + 60423^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20446580533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20446580233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10223290266 + 10223290267.

It is an arithmetic number, because the mean of its divisors is an integer number (10223290267).

Almost surely, 2^20446580533 is an apocalyptic number.

It is an amenable number.

20446580533 is a deficient number, since it is larger than the sum of its proper divisors (1).

20446580533 is an equidigital number, since it uses as much as digits as its factorization.

20446580533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 20446580533 in words is "twenty billion, four hundred forty-six million, five hundred eighty thousand, five hundred thirty-three".