20704317 has 8 divisors (see below), whose sum is σ = 29229696. Its totient is φ = 12990912.

The previous prime is 20704309. The next prime is 20704379. The reversal of 20704317 is 71340702.

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

It is not a de Polignac number, because 20704317 - 2³ = 20704309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20704217) 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, 202933 + ... + 203034.

It is an arithmetic number, because the mean of its divisors is an integer number (3653712).

Almost surely, 2^20704317 is an apocalyptic number.

It is an amenable number.

20704317 is a deficient number, since it is larger than the sum of its proper divisors (8525379).

20704317 is a wasteful number, since it uses less digits than its factorization.

20704317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405987.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 20704317 is about 4550.1996659487. The cubic root of 20704317 is about 274.5914241210.

The spelling of 20704317 in words is "twenty million, seven hundred four thousand, three hundred seventeen".