21230023022309 has 16 divisors (see below), whose sum is σ = 21303428442240. Its totient is φ = 21156739168320.

The previous prime is 21230023022291. The next prime is 21230023022311. The reversal of 21230023022309 is 90322032003212.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21230023022309 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 (21230023022009) 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, 2071823024 + ... + 2071833270.

It is an arithmetic number, because the mean of its divisors is an integer number (1331464277640).

Almost surely, 2^{21230023022309} is an apocalyptic number.

It is an amenable number.

21230023022309 is a deficient number, since it is larger than the sum of its proper divisors (73405419931).

21230023022309 is a wasteful number, since it uses less digits than its factorization.

21230023022309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15500.

The product of its (nonzero) digits is 7776, while the sum is 29.

The spelling of 21230023022309 in words is "twenty-one trillion, two hundred thirty billion, twenty-three million, twenty-two thousand, three hundred nine".