20703717 has 6 divisors (see below), whose sum is σ = 29905382. Its totient is φ = 13802472.

The previous prime is 20703707. The next prime is 20703731. The reversal of 20703717 is 71730702.

It can be written as a sum of positive squares in only one way, i.e., 19793601 + 910116 = 4449^2 + 954^2 .

It is not a de Polignac number, because 20703717 - 2⁶ = 20703653 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 (20703707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1150198 + ... + 1150215.

Almost surely, 2^20703717 is an apocalyptic number.

It is an amenable number.

20703717 is a deficient number, since it is larger than the sum of its proper divisors (9201665).

20703717 is a wasteful number, since it uses less digits than its factorization.

20703717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300419 (or 2300416 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 27.

The square root of 20703717 is about 4550.1337342984. The cubic root of 20703717 is about 274.5887715913.

The spelling of 20703717 in words is "twenty million, seven hundred three thousand, seven hundred seventeen".