20342216 has 16 divisors (see below), whose sum is σ = 38204700. Its totient is φ = 10154304.

The previous prime is 20342213. The next prime is 20342243. The reversal of 20342216 is 61224302.

It can be written as a sum of positive squares in 2 ways, for example, as 20340100 + 2116 = 4510^2 + 46^2 .

It is not an unprimeable number, because it can be changed into a prime (20342213) 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, 4130 + ... + 7598.

Almost surely, 2^20342216 is an apocalyptic number.

It is an amenable number.

20342216 is a deficient number, since it is larger than the sum of its proper divisors (17862484).

20342216 is a wasteful number, since it uses less digits than its factorization.

20342216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208 (or 4204 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20342216 is about 4510.2345836996. The cubic root of 20342216 is about 272.9812096000.

Adding to 20342216 its reverse (61224302), we get a palindrome (81566518).

The spelling of 20342216 in words is "twenty million, three hundred forty-two thousand, two hundred sixteen".