21304103717 has 16 divisors (see below), whose sum is σ = 23976196608. Its totient is φ = 18782184960.

The previous prime is 21304103669. The next prime is 21304103747. The reversal of 21304103717 is 71730140312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21304103717 - 2¹⁰ = 21304102693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21304103717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304103747) 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, 148292 + ... + 254162.

It is an arithmetic number, because the mean of its divisors is an integer number (1498512288).

Almost surely, 2^21304103717 is an apocalyptic number.

It is an amenable number.

21304103717 is a deficient number, since it is larger than the sum of its proper divisors (2672092891).

21304103717 is a wasteful number, since it uses less digits than its factorization.

21304103717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106580.

The product of its (nonzero) digits is 3528, while the sum is 29.

The spelling of 21304103717 in words is "twenty-one billion, three hundred four million, one hundred three thousand, seven hundred seventeen".