21626133329 has 2 divisors, whose sum is σ = 21626133330. Its totient is φ = 21626133328.

The previous prime is 21626133281. The next prime is 21626133349. The reversal of 21626133329 is 92333162612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21601650625 + 24482704 = 146975^2 + 4948^2 .

It is a cyclic number.

It is not a de Polignac number, because 21626133329 - 2⁸ = 21626133073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21626133292 and 21626133301.

It is not a weakly prime, because it can be changed into another prime (21626133349) 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, 10813066664 + 10813066665.

It is an arithmetic number, because the mean of its divisors is an integer number (10813066665).

Almost surely, 2^21626133329 is an apocalyptic number.

It is an amenable number.

21626133329 is a deficient number, since it is larger than the sum of its proper divisors (1).

21626133329 is an equidigital number, since it uses as much as digits as its factorization.

21626133329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 38.

The spelling of 21626133329 in words is "twenty-one billion, six hundred twenty-six million, one hundred thirty-three thousand, three hundred twenty-nine".