20330217 has 16 divisors (see below), whose sum is σ = 30689280. Its totient is φ = 13296816.

The previous prime is 20330207. The next prime is 20330237. The reversal of 20330217 is 71203302.

It is not a de Polignac number, because 20330217 - 2⁴ = 20330201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20330217.

It is not an unprimeable number, because it can be changed into a prime (20330207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5673 + ... + 8534.

It is an arithmetic number, because the mean of its divisors is an integer number (1918080).

Almost surely, 2^20330217 is an apocalyptic number.

20330217 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20330217 is a deficient number, since it is larger than the sum of its proper divisors (10359063).

20330217 is a wasteful number, since it uses less digits than its factorization.

20330217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14269 (or 14263 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 20330217 is about 4508.9041905989. The cubic root of 20330217 is about 272.9275257442.

Adding to 20330217 its reverse (71203302), we get a palindrome (91533519).

The spelling of 20330217 in words is "twenty million, three hundred thirty thousand, two hundred seventeen".