20317697 has 8 divisors (see below), whose sum is σ = 20748672. Its totient is φ = 19890000.

The previous prime is 20317691. The next prime is 20317711. The reversal of 20317697 is 79671302.

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 20317697 - 2⁴ = 20317681 is a prime.

It is a super-2 number, since 2×20317697² = 825617622767618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20317691) 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, 14648 + ... + 15974.

It is an arithmetic number, because the mean of its divisors is an integer number (2593584).

Almost surely, 2^20317697 is an apocalyptic number.

It is an amenable number.

20317697 is a deficient number, since it is larger than the sum of its proper divisors (430975).

20317697 is a wasteful number, since it uses less digits than its factorization.

20317697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 20317697 is about 4507.5156128404. The cubic root of 20317697 is about 272.8714883967.

Adding to 20317697 its reverse (79671302), we get a palindrome (99988999).

The spelling of 20317697 in words is "twenty million, three hundred seventeen thousand, six hundred ninety-seven".