20123317 has 8 divisors (see below), whose sum is σ = 20552832. Its totient is φ = 19698000.

The previous prime is 20123293. The next prime is 20123339. The reversal of 20123317 is 71332102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123294 and 20123303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9783 + ... + 11659.

It is an arithmetic number, because the mean of its divisors is an integer number (2569104).

Almost surely, 2^20123317 is an apocalyptic number.

It is an amenable number.

20123317 is a deficient number, since it is larger than the sum of its proper divisors (429515).

20123317 is a wasteful number, since it uses less digits than its factorization.

20123317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 20123317 is about 4485.9020274634. The cubic root of 20123317 is about 271.9985086784.

Adding to 20123317 its reverse (71332102), we get a palindrome (91455419).

It can be divided in two parts, 2012 and 3317, that added together give a square (5329 = 73²).

The spelling of 20123317 in words is "twenty million, one hundred twenty-three thousand, three hundred seventeen".