21411715917 has 8 divisors (see below), whose sum is σ = 30228304896. Its totient is φ = 13434802112.

The previous prime is 21411715877. The next prime is 21411715931. The reversal of 21411715917 is 71951711412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21411715917 - 2¹⁵ = 21411683149 is a prime.

It is a super-2 number, since 2×21411715917² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411715987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209918733 + ... + 209918834.

It is an arithmetic number, because the mean of its divisors is an integer number (3778538112).

Almost surely, 2^21411715917 is an apocalyptic number.

It is an amenable number.

21411715917 is a deficient number, since it is larger than the sum of its proper divisors (8816588979).

21411715917 is a wasteful number, since it uses less digits than its factorization.

21411715917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419837587.

The product of its digits is 17640, while the sum is 39.

The spelling of 21411715917 in words is "twenty-one billion, four hundred eleven million, seven hundred fifteen thousand, nine hundred seventeen".