20117583 has 6 divisors (see below), whose sum is σ = 29058744. Its totient is φ = 13411716.

The previous prime is 20117567. The next prime is 20117611. The reversal of 20117583 is 38571102.

It is not a de Polignac number, because 20117583 - 2⁴ = 20117567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117563) 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, 1117635 + ... + 1117652.

It is an arithmetic number, because the mean of its divisors is an integer number (4843124).

Almost surely, 2^20117583 is an apocalyptic number.

20117583 is a deficient number, since it is larger than the sum of its proper divisors (8941161).

20117583 is a wasteful number, since it uses less digits than its factorization.

20117583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2235293 (or 2235290 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 20117583 is about 4485.2628685507. The cubic root of 20117583 is about 271.9726715263.

Adding to 20117583 its reverse (38571102), we get a palindrome (58688685).

The spelling of 20117583 in words is "twenty million, one hundred seventeen thousand, five hundred eighty-three".