21433200353 has 2 divisors, whose sum is σ = 21433200354. Its totient is φ = 21433200352.

The previous prime is 21433200311. The next prime is 21433200361. The reversal of 21433200353 is 35300233412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12203179024 + 9230021329 = 110468^2 + 96073^2 .

It is a cyclic number.

It is not a de Polignac number, because 21433200353 - 2⁶ = 21433200289 is a prime.

It is not a weakly prime, because it can be changed into another prime (21433200253) 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, 10716600176 + 10716600177.

It is an arithmetic number, because the mean of its divisors is an integer number (10716600177).

Almost surely, 2^21433200353 is an apocalyptic number.

It is an amenable number.

21433200353 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433200353 is an equidigital number, since it uses as much as digits as its factorization.

21433200353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 26.

Adding to 21433200353 its reverse (35300233412), we get a palindrome (56733433765).

The spelling of 21433200353 in words is "twenty-one billion, four hundred thirty-three million, two hundred thousand, three hundred fifty-three".