21303323021309 has 16 divisors (see below), whose sum is σ = 24375585696000. Its totient is φ = 18238305855744.

The previous prime is 21303323021293. The next prime is 21303323021311. The reversal of 21303323021309 is 90312032330312.

It is a cyclic number.

It is not a de Polignac number, because 21303323021309 - 2⁴ = 21303323021293 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303323621309) 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 in 15 ways as a sum of consecutive naturals, for example, 19495157 + ... + 20558885.

It is an arithmetic number, because the mean of its divisors is an integer number (1523474106000).

Almost surely, 2^{21303323021309} is an apocalyptic number.

It is an amenable number.

21303323021309 is a deficient number, since it is larger than the sum of its proper divisors (3072262674691).

21303323021309 is a wasteful number, since it uses less digits than its factorization.

21303323021309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067132.

The product of its (nonzero) digits is 17496, while the sum is 32.

The spelling of 21303323021309 in words is "twenty-one trillion, three hundred three billion, three hundred twenty-three million, twenty-one thousand, three hundred nine".