21063909713 has 32 divisors (see below), whose sum is σ = 27662039040. Its totient is φ = 15539247360.

The previous prime is 21063909697. The next prime is 21063909719. The reversal of 21063909713 is 31790936012.

It is not a de Polignac number, because 21063909713 - 2⁴ = 21063909697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21063909719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2736356 + ... + 2744042.

It is an arithmetic number, because the mean of its divisors is an integer number (864438720).

Almost surely, 2^21063909713 is an apocalyptic number.

It is an amenable number.

21063909713 is a deficient number, since it is larger than the sum of its proper divisors (6598129327).

21063909713 is a wasteful number, since it uses less digits than its factorization.

21063909713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9597.

The product of its (nonzero) digits is 61236, while the sum is 41.

The spelling of 21063909713 in words is "twenty-one billion, sixty-three million, nine hundred nine thousand, seven hundred thirteen".