21167367433 has 2 divisors, whose sum is σ = 21167367434. Its totient is φ = 21167367432.

The previous prime is 21167367413. The next prime is 21167367439. The reversal of 21167367433 is 33476376112.

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., 15328420864 + 5838946569 = 123808^2 + 76413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21167367433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21167367433.

It is not a weakly prime, because it can be changed into another prime (21167367439) 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, 10583683716 + 10583683717.

It is an arithmetic number, because the mean of its divisors is an integer number (10583683717).

Almost surely, 2^21167367433 is an apocalyptic number.

It is an amenable number.

21167367433 is a deficient number, since it is larger than the sum of its proper divisors (1).

21167367433 is an equidigital number, since it uses as much as digits as its factorization.

21167367433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 43.

The spelling of 21167367433 in words is "twenty-one billion, one hundred sixty-seven million, three hundred sixty-seven thousand, four hundred thirty-three".