20217230 has 64 divisors (see below), whose sum is σ = 42425856. Its totient is φ = 6864000.

The previous prime is 20217229. The next prime is 20217259. The reversal of 20217230 is 3271202.

It is a junction number, because it is equal to n+sod(n) for n = 20217199 and 20217208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154265 + ... + 154395.

It is an arithmetic number, because the mean of its divisors is an integer number (662904).

Almost surely, 2^20217230 is an apocalyptic number.

20217230 is an abundant number, since it is smaller than the sum of its proper divisors (22208626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20217230 is a wasteful number, since it uses less digits than its factorization.

20217230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 20217230 is about 4496.3574146191. The cubic root of 20217230 is about 272.4209798092.

Adding to 20217230 its reverse (3271202), we get a palindrome (23488432).

It can be divided in two parts, 202172 and 30, that added together give a palindrome (202202).

The spelling of 20217230 in words is "twenty million, two hundred seventeen thousand, two hundred thirty".