20021332033 has 2 divisors, whose sum is σ = 20021332034. Its totient is φ = 20021332032.

The previous prime is 20021331991. The next prime is 20021332087. The reversal of 20021332033 is 33023312002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16188236289 + 3833095744 = 127233^2 + 61912^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20021332033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20021332033.

It is not a weakly prime, because it can be changed into another prime (20021330033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010666016 + 10010666017.

It is an arithmetic number, because the mean of its divisors is an integer number (10010666017).

Almost surely, 2^20021332033 is an apocalyptic number.

It is an amenable number.

20021332033 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021332033 is an equidigital number, since it uses as much as digits as its factorization.

20021332033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 20021332033 its reverse (33023312002), we get a palindrome (53044644035).

The spelling of 20021332033 in words is "twenty billion, twenty-one million, three hundred thirty-two thousand, thirty-three".