16733236021 has 2 divisors, whose sum is σ = 16733236022. Its totient is φ = 16733236020.

The previous prime is 16733235979. The next prime is 16733236049. The reversal of 16733236021 is 12063233761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11132360100 + 5600875921 = 105510^2 + 74839^2 .

It is an emirp because it is prime and its reverse (12063233761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16733236021 - 2³¹ = 14585752373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16733236061) 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, 8366618010 + 8366618011.

It is an arithmetic number, because the mean of its divisors is an integer number (8366618011).

Almost surely, 2^16733236021 is an apocalyptic number.

It is an amenable number.

16733236021 is a deficient number, since it is larger than the sum of its proper divisors (1).

16733236021 is an equidigital number, since it uses as much as digits as its factorization.

16733236021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 34.

Adding to 16733236021 its reverse (12063233761), we get a palindrome (28796469782).

The spelling of 16733236021 in words is "sixteen billion, seven hundred thirty-three million, two hundred thirty-six thousand, twenty-one".