20016217 has 8 divisors (see below), whose sum is σ = 21591360. Its totient is φ = 18446160.

The previous prime is 20016193. The next prime is 20016221. The reversal of 20016217 is 71261002.

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-20016217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20016194 and 20016203.

It is not an unprimeable number, because it can be changed into a prime (20016287) 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, 12492 + ... + 14002.

It is an arithmetic number, because the mean of its divisors is an integer number (2698920).

Almost surely, 2^20016217 is an apocalyptic number.

It is an amenable number.

20016217 is a deficient number, since it is larger than the sum of its proper divisors (1575143).

20016217 is a wasteful number, since it uses less digits than its factorization.

20016217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2543.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 20016217 is about 4473.9487033268. The cubic root of 20016217 is about 271.5151080229.

Adding to 20016217 its reverse (71261002), we get a palindrome (91277219).

The spelling of 20016217 in words is "twenty million, sixteen thousand, two hundred seventeen".