20086517 has 4 divisors (see below), whose sum is σ = 21912576. Its totient is φ = 18260460.

The previous prime is 20086489. The next prime is 20086519. The reversal of 20086517 is 71568002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20086517 - 2⁶ = 20086453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20086517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20086519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913013 + ... + 913034.

It is an arithmetic number, because the mean of its divisors is an integer number (5478144).

Almost surely, 2^20086517 is an apocalyptic number.

It is an amenable number.

20086517 is a deficient number, since it is larger than the sum of its proper divisors (1826059).

20086517 is a wasteful number, since it uses less digits than its factorization.

20086517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826058.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 20086517 is about 4481.7984113523. The cubic root of 20086517 is about 271.8326040731.

The spelling of 20086517 in words is "twenty million, eighty-six thousand, five hundred seventeen".