21322799 has 2 divisors, whose sum is σ = 21322800. Its totient is φ = 21322798.

The previous prime is 21322793. The next prime is 21322849. The reversal of 21322799 is 99722312.

21322799 is nontrivially palindromic in base 13.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21322799 - 2²⁰ = 20274223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21322793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661399 + 10661400.

It is an arithmetic number, because the mean of its divisors is an integer number (10661400).

Almost surely, 2^21322799 is an apocalyptic number.

21322799 is a deficient number, since it is larger than the sum of its proper divisors (1).

21322799 is an equidigital number, since it uses as much as digits as its factorization.

21322799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The square root of 21322799 is about 4617.6616376690. The cubic root of 21322799 is about 277.2988516067.

The spelling of 21322799 in words is "twenty-one million, three hundred twenty-two thousand, seven hundred ninety-nine".