21433352329 has 2 divisors, whose sum is σ = 21433352330. Its totient is φ = 21433352328.

The previous prime is 21433352273. The next prime is 21433352357. The reversal of 21433352329 is 92325333412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21349593225 + 83759104 = 146115^2 + 9152^2 .

It is a cyclic number.

It is not a de Polignac number, because 21433352329 - 2¹³ = 21433344137 is a prime.

It is not a weakly prime, because it can be changed into another prime (21433352029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716676164 + 10716676165.

It is an arithmetic number, because the mean of its divisors is an integer number (10716676165).

Almost surely, 2^21433352329 is an apocalyptic number.

It is an amenable number.

21433352329 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433352329 is an equidigital number, since it uses as much as digits as its factorization.

21433352329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 37.

It can be divided in two parts, 214333 and 52329, that added together give a palindrome (266662).

The spelling of 21433352329 in words is "twenty-one billion, four hundred thirty-three million, three hundred fifty-two thousand, three hundred twenty-nine".