20312230 has 8 divisors (see below), whose sum is σ = 36562032. Its totient is φ = 8124888.

The previous prime is 20312221. The next prime is 20312233. The reversal of 20312230 is 3221302.

It is a happy number.

20312230 is nontrivially palindromic in base 9.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20312230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1015602 + ... + 1015621.

It is an arithmetic number, because the mean of its divisors is an integer number (4570254).

Almost surely, 2^20312230 is an apocalyptic number.

20312230 is a deficient number, since it is larger than the sum of its proper divisors (16249802).

20312230 is a wasteful number, since it uses less digits than its factorization.

20312230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031230.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20312230 is about 4506.9091404199. The cubic root of 20312230 is about 272.8470118324.

Adding to 20312230 its reverse (3221302), we get a palindrome (23533532).

The spelling of 20312230 in words is "twenty million, three hundred twelve thousand, two hundred thirty".