21013434083 has 2 divisors, whose sum is σ = 21013434084. Its totient is φ = 21013434082.

The previous prime is 21013434067. The next prime is 21013434119. The reversal of 21013434083 is 38043431012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21013434083 - 2⁴ = 21013434067 is a prime.

It is not a weakly prime, because it can be changed into another prime (21013434023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506717041 + 10506717042.

It is an arithmetic number, because the mean of its divisors is an integer number (10506717042).

Almost surely, 2^21013434083 is an apocalyptic number.

21013434083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013434083 is an equidigital number, since it uses as much as digits as its factorization.

21013434083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 21013434083 its reverse (38043431012), we get a palindrome (59056865095).

The spelling of 21013434083 in words is "twenty-one billion, thirteen million, four hundred thirty-four thousand, eighty-three".