20340284 has 12 divisors (see below), whose sum is σ = 36353184. Its totient is φ = 9953664.

The previous prime is 20340283. The next prime is 20340301. The reversal of 20340284 is 48204302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340283) 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, 53909 + ... + 54284.

It is an arithmetic number, because the mean of its divisors is an integer number (3029432).

Almost surely, 2^20340284 is an apocalyptic number.

It is an amenable number.

20340284 is a deficient number, since it is larger than the sum of its proper divisors (16012900).

20340284 is a wasteful number, since it uses less digits than its factorization.

20340284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108244 (or 108242 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 20340284 is about 4510.0203990669. The cubic root of 20340284 is about 272.9725672050.

Adding to 20340284 its reverse (48204302), we get a palindrome (68544586).

The spelling of 20340284 in words is "twenty million, three hundred forty thousand, two hundred eighty-four".