21134313433 has 2 divisors, whose sum is σ = 21134313434. Its totient is φ = 21134313432.

The previous prime is 21134313413. The next prime is 21134313437. The reversal of 21134313433 is 33431343112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10975286169 + 10159027264 = 104763^2 + 100792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21134313433 is a prime.

It is not a weakly prime, because it can be changed into another prime (21134313437) 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, 10567156716 + 10567156717.

It is an arithmetic number, because the mean of its divisors is an integer number (10567156717).

Almost surely, 2^21134313433 is an apocalyptic number.

It is an amenable number.

21134313433 is a deficient number, since it is larger than the sum of its proper divisors (1).

21134313433 is an equidigital number, since it uses as much as digits as its factorization.

21134313433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 28.

Adding to 21134313433 its reverse (33431343112), we get a palindrome (54565656545).

The spelling of 21134313433 in words is "twenty-one billion, one hundred thirty-four million, three hundred thirteen thousand, four hundred thirty-three".