20442317 has 8 divisors (see below), whose sum is σ = 23444736. Its totient is φ = 17460432.

The previous prime is 20442293. The next prime is 20442349. The reversal of 20442317 is 71324402.

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 20442317 - 2⁸ = 20442061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20442292 and 20442301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442397) 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, 2933 + ... + 7034.

It is an arithmetic number, because the mean of its divisors is an integer number (2930592).

Almost surely, 2^20442317 is an apocalyptic number.

It is an amenable number.

20442317 is a deficient number, since it is larger than the sum of its proper divisors (3002419).

20442317 is an equidigital number, since it uses as much as digits as its factorization.

20442317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10267.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20442317 is about 4521.3180600351. The cubic root of 20442317 is about 273.4282436943.

Adding to 20442317 its reverse (71324402), we get a palindrome (91766719).

The spelling of 20442317 in words is "twenty million, four hundred forty-two thousand, three hundred seventeen".