21411432353 has 2 divisors, whose sum is σ = 21411432354. Its totient is φ = 21411432352.

The previous prime is 21411432319. The next prime is 21411432379. The reversal of 21411432353 is 35323411412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18787636624 + 2623795729 = 137068^2 + 51223^2 .

It is a cyclic number.

It is not a de Polignac number, because 21411432353 - 2¹² = 21411428257 is a prime.

It is not a weakly prime, because it can be changed into another prime (21411438353) 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, 10705716176 + 10705716177.

It is an arithmetic number, because the mean of its divisors is an integer number (10705716177).

Almost surely, 2^21411432353 is an apocalyptic number.

It is an amenable number.

21411432353 is a deficient number, since it is larger than the sum of its proper divisors (1).

21411432353 is an equidigital number, since it uses as much as digits as its factorization.

21411432353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 29.

Adding to 21411432353 its reverse (35323411412), we get a palindrome (56734843765).

The spelling of 21411432353 in words is "twenty-one billion, four hundred eleven million, four hundred thirty-two thousand, three hundred fifty-three".