21323627329 has 2 divisors, whose sum is σ = 21323627330. Its totient is φ = 21323627328.

The previous prime is 21323627317. The next prime is 21323627333. The reversal of 21323627329 is 92372632312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11984337729 + 9339289600 = 109473^2 + 96640^2 .

It is a cyclic number.

It is not a de Polignac number, because 21323627329 - 2¹³ = 21323619137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21323627291 and 21323627300.

It is not a weakly prime, because it can be changed into another prime (21323627399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661813664 + 10661813665.

It is an arithmetic number, because the mean of its divisors is an integer number (10661813665).

Almost surely, 2^21323627329 is an apocalyptic number.

It is an amenable number.

21323627329 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323627329 is an equidigital number, since it uses as much as digits as its factorization.

21323627329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 40.

The spelling of 21323627329 in words is "twenty-one billion, three hundred twenty-three million, six hundred twenty-seven thousand, three hundred twenty-nine".