20705832317 has 8 divisors (see below), whose sum is σ = 21634055424. Its totient is φ = 19779940048.

The previous prime is 20705832241. The next prime is 20705832361. The reversal of 20705832317 is 71323850702.

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 20705832317 - 2³⁰ = 19632090493 is a prime.

It is a super-3 number, since 3×20705832317³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20705832817) 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, 564533 + ... + 600090.

It is an arithmetic number, because the mean of its divisors is an integer number (2704256928).

Almost surely, 2^20705832317 is an apocalyptic number.

It is an amenable number.

20705832317 is a deficient number, since it is larger than the sum of its proper divisors (928223107).

20705832317 is a wasteful number, since it uses less digits than its factorization.

20705832317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165419.

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 20705832317 in words is "twenty billion, seven hundred five million, eight hundred thirty-two thousand, three hundred seventeen".