21003134833 has 2 divisors, whose sum is σ = 21003134834. Its totient is φ = 21003134832.

The previous prime is 21003134827. The next prime is 21003134837. The reversal of 21003134833 is 33843130012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20890944369 + 112190464 = 144537^2 + 10592^2 .

It is a cyclic number.

It is not a de Polignac number, because 21003134833 - 2²⁹ = 20466263921 is a prime.

It is a super-2 number, since 2×21003134833² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21003134837) 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, 10501567416 + 10501567417.

It is an arithmetic number, because the mean of its divisors is an integer number (10501567417).

Almost surely, 2^21003134833 is an apocalyptic number.

It is an amenable number.

21003134833 is a deficient number, since it is larger than the sum of its proper divisors (1).

21003134833 is an equidigital number, since it uses as much as digits as its factorization.

21003134833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 21003134833 its reverse (33843130012), we get a palindrome (54846264845).

The spelling of 21003134833 in words is "twenty-one billion, three million, one hundred thirty-four thousand, eight hundred thirty-three".