20385417 has 8 divisors (see below), whose sum is σ = 29271424. Its totient is φ = 12544848.

The previous prime is 20385401. The next prime is 20385419. The reversal of 20385417 is 71458302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20385417 - 2⁴ = 20385401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20385419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261313 + ... + 261390.

It is an arithmetic number, because the mean of its divisors is an integer number (3658928).

Almost surely, 2^20385417 is an apocalyptic number.

It is an amenable number.

20385417 is a deficient number, since it is larger than the sum of its proper divisors (8886007).

20385417 is a wasteful number, since it uses less digits than its factorization.

20385417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522719.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20385417 is about 4515.0212624084. The cubic root of 20385417 is about 273.1743174161.

It can be divided in two parts, 20385 and 417, that added together give a palindrome (20802).

The spelling of 20385417 in words is "twenty million, three hundred eighty-five thousand, four hundred seventeen".