20006917 has 8 divisors (see below), whose sum is σ = 23296896. Its totient is φ = 16824912.

The previous prime is 20006887. The next prime is 20006923. The reversal of 20006917 is 71960002.

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 20006917 - 2²³ = 11618309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20006891 and 20006900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20006927) 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, 26593 + ... + 27334.

It is an arithmetic number, because the mean of its divisors is an integer number (2912112).

Almost surely, 2^20006917 is an apocalyptic number.

It is an amenable number.

20006917 is a deficient number, since it is larger than the sum of its proper divisors (3289979).

20006917 is an equidigital number, since it uses as much as digits as its factorization.

20006917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53987.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 20006917 is about 4472.9092322559. The cubic root of 20006917 is about 271.4730507637.

Adding to 20006917 its reverse (71960002), we get a palindrome (91966919).

The spelling of 20006917 in words is "twenty million, six thousand, nine hundred seventeen".