21717415413 has 16 divisors (see below), whose sum is σ = 32179012800. Its totient is φ = 14475998160.

The previous prime is 21717415411. The next prime is 21717415427. The reversal of 21717415413 is 31451471712.

21717415413 is a `hidden beast` number, since 2 + 1 + 71 + 7 + 41 + 541 + 3 = 666.

It is not a de Polignac number, because 21717415413 - 2¹ = 21717415411 is a prime.

It is a super-2 number, since 2×21717415413² (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 (21717415411) 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, 121198 + ... + 241088.

It is an arithmetic number, because the mean of its divisors is an integer number (2011188300).

Almost surely, 2^21717415413 is an apocalyptic number.

It is an amenable number.

21717415413 is a deficient number, since it is larger than the sum of its proper divisors (10461597387).

21717415413 is a wasteful number, since it uses less digits than its factorization.

21717415413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126609 (or 126603 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The spelling of 21717415413 in words is "twenty-one billion, seven hundred seventeen million, four hundred fifteen thousand, four hundred thirteen".