20229717 has 4 divisors (see below), whose sum is σ = 26972960. Its totient is φ = 13486476.

The previous prime is 20229709. The next prime is 20229721. The reversal of 20229717 is 71792202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20229717 - 2³ = 20229709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20229757) 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 3 ways as a sum of consecutive naturals, for example, 3371617 + ... + 3371622.

It is an arithmetic number, because the mean of its divisors is an integer number (6743240).

Almost surely, 2^20229717 is an apocalyptic number.

It is an amenable number.

20229717 is a deficient number, since it is larger than the sum of its proper divisors (6743243).

20229717 is an equidigital number, since it uses as much as digits as its factorization.

20229717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6743242.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 20229717 is about 4497.7457687157. The cubic root of 20229717 is about 272.4770544325.

The spelling of 20229717 in words is "twenty million, two hundred twenty-nine thousand, seven hundred seventeen".