20070517 has 12 divisors (see below), whose sum is σ = 21602700. Its totient is φ = 18637632.

The previous prime is 20070509. The next prime is 20070529. The reversal of 20070517 is 71507002.

It can be written as a sum of positive squares in 2 ways, for example, as 16532356 + 3538161 = 4066^2 + 1881^2 .

It is not a de Polignac number, because 20070517 - 2³ = 20070509 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 (20070577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18609 + ... + 19657.

It is an arithmetic number, because the mean of its divisors is an integer number (1800225).

Almost surely, 2^20070517 is an apocalyptic number.

It is an amenable number.

20070517 is a deficient number, since it is larger than the sum of its proper divisors (1532183).

20070517 is a wasteful number, since it uses less digits than its factorization.

20070517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1121 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 22.

The square root of 20070517 is about 4480.0130580167. The cubic root of 20070517 is about 271.7604084306.

Adding to 20070517 its reverse (71507002), we get a palindrome (91577519).

The spelling of 20070517 in words is "twenty million, seventy thousand, five hundred seventeen".