20530017 has 20 divisors (see below), whose sum is σ = 30852096. Its totient is φ = 13604760.

The previous prime is 20529991. The next prime is 20530019. The reversal of 20530017 is 71003502.

It is not a de Polignac number, because 20530017 - 2¹⁰ = 20528993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20530019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14808 + ... + 16134.

Almost surely, 2^20530017 is an apocalyptic number.

20530017 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20530017 is a deficient number, since it is larger than the sum of its proper divisors (10322079).

20530017 is a wasteful number, since it uses less digits than its factorization.

20530017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530 (or 1521 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 20530017 is about 4531.0061796471. The cubic root of 20530017 is about 273.8186992152.

Adding to 20530017 its reverse (71003502), we get a palindrome (91533519).

The spelling of 20530017 in words is "twenty million, five hundred thirty thousand, seventeen".