21300322309 has 16 divisors (see below), whose sum is σ = 25089292800. Its totient is φ = 17704998144.

The previous prime is 21300322283. The next prime is 21300322321. The reversal of 21300322309 is 90322300312.

It is a cyclic number.

It is not a de Polignac number, because 21300322309 - 2⁹ = 21300321797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300322339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261124 + ... + 332845.

It is an arithmetic number, because the mean of its divisors is an integer number (1568080800).

Almost surely, 2^21300322309 is an apocalyptic number.

It is an amenable number.

21300322309 is a deficient number, since it is larger than the sum of its proper divisors (3788970491).

21300322309 is a wasteful number, since it uses less digits than its factorization.

21300322309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594132.

The product of its (nonzero) digits is 1944, while the sum is 25.

The spelling of 21300322309 in words is "twenty-one billion, three hundred million, three hundred twenty-two thousand, three hundred nine".