20332217 has 2 divisors, whose sum is σ = 20332218. Its totient is φ = 20332216.

The previous prime is 20332211. The next prime is 20332229. The reversal of 20332217 is 71223302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17606416 + 2725801 = 4196^2 + 1651^2 .

It is a cyclic number.

It is not a de Polignac number, because 20332217 - 2¹⁶ = 20266681 is a prime.

It is equal to p_1290314 and since 20332217 and 1290314 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20332211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10166108 + 10166109.

It is an arithmetic number, because the mean of its divisors is an integer number (10166109).

Almost surely, 2^20332217 is an apocalyptic number.

It is an amenable number.

20332217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20332217 is an equidigital number, since it uses as much as digits as its factorization.

20332217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 20332217 is about 4509.1259685221. The cubic root of 20332217 is about 272.9364752659.

Adding to 20332217 its reverse (71223302), we get a palindrome (91555519).

The spelling of 20332217 in words is "twenty million, three hundred thirty-two thousand, two hundred seventeen".