20317969 has 8 divisors (see below), whose sum is σ = 23398848. Its totient is φ = 17281680.

The previous prime is 20317967. The next prime is 20317981. The reversal of 20317969 is 96971302.

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 20317969 - 2¹ = 20317967 is a prime.

It is a super-2 number, since 2×20317969² = 825639728569922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20317963) 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, 10162 + ... + 11995.

It is an arithmetic number, because the mean of its divisors is an integer number (2924856).

Almost surely, 2^20317969 is an apocalyptic number.

It is an amenable number.

20317969 is a deficient number, since it is larger than the sum of its proper divisors (3080879).

20317969 is a wasteful number, since it uses less digits than its factorization.

20317969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22295.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 20317969 is about 4507.5457845706. The cubic root of 20317969 is about 272.8727060661.

It can be divided in two parts, 2031 and 7969, that added together give a 4-th power (10000 = 10⁴).

The spelling of 20317969 in words is "twenty million, three hundred seventeen thousand, nine hundred sixty-nine".