20331717 has 12 divisors (see below), whose sum is σ = 31535136. Its totient is φ = 11618040.

The previous prime is 20331679. The next prime is 20331721. The reversal of 20331717 is 71713302.

It is not a de Polignac number, because 20331717 - 2⁸ = 20331461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331317) 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 11 ways as a sum of consecutive naturals, for example, 69009 + ... + 69302.

It is an arithmetic number, because the mean of its divisors is an integer number (2627928).

Almost surely, 2^20331717 is an apocalyptic number.

It is an amenable number.

20331717 is a deficient number, since it is larger than the sum of its proper divisors (11203419).

20331717 is a wasteful number, since it uses less digits than its factorization.

20331717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138328 (or 138321 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 20331717 is about 4509.0705250639. The cubic root of 20331717 is about 272.9342379405.

The spelling of 20331717 in words is "twenty million, three hundred thirty-one thousand, seven hundred seventeen".