20608217 has 16 divisors (see below), whose sum is σ = 25084800. Its totient is φ = 16536960.

The previous prime is 20608213. The next prime is 20608219. The reversal of 20608217 is 71280602.

It is a cyclic number.

It is not a de Polignac number, because 20608217 - 2² = 20608213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20608213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10967 + ... + 12707.

It is an arithmetic number, because the mean of its divisors is an integer number (1567800).

Almost surely, 2^20608217 is an apocalyptic number.

It is an amenable number.

20608217 is a deficient number, since it is larger than the sum of its proper divisors (4476583).

20608217 is a wasteful number, since it uses less digits than its factorization.

20608217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 20608217 is about 4539.6274076184. The cubic root of 20608217 is about 274.1659223790.

Adding to 20608217 its reverse (71280602), we get a palindrome (91888819).

The spelling of 20608217 in words is "twenty million, six hundred eight thousand, two hundred seventeen".