21160456317 has 48 divisors (see below), whose sum is σ = 41038478208. Its totient is φ = 10146867840.

The previous prime is 21160456267. The next prime is 21160456321. The reversal of 21160456317 is 71365406112.

21160456317 is a `hidden beast` number, since 2 + 1 + 16 + 0 + 4 + 5 + 631 + 7 = 666.

It is not a de Polignac number, because 21160456317 - 2⁸ = 21160456061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160456217) 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 47 ways as a sum of consecutive naturals, for example, 1165398 + ... + 1183415.

It is an arithmetic number, because the mean of its divisors is an integer number (854968296).

Almost surely, 2^21160456317 is an apocalyptic number.

It is an amenable number.

21160456317 is a deficient number, since it is larger than the sum of its proper divisors (19878021891).

21160456317 is a wasteful number, since it uses less digits than its factorization.

21160456317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348850 (or 2348847 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 21160456317 in words is "twenty-one billion, one hundred sixty million, four hundred fifty-six thousand, three hundred seventeen".