20144216 has 16 divisors (see below), whose sum is σ = 37832400. Its totient is φ = 10055584.

The previous prime is 20144209. The next prime is 20144219. The reversal of 20144216 is 61244102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20144219) 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, 4250 + ... + 7638.

It is an arithmetic number, because the mean of its divisors is an integer number (2364525).

Almost surely, 2^20144216 is an apocalyptic number.

It is an amenable number.

20144216 is a deficient number, since it is larger than the sum of its proper divisors (17688184).

20144216 is a wasteful number, since it uses less digits than its factorization.

20144216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4138 (or 4134 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20144216 is about 4488.2308318535. The cubic root of 20144216 is about 272.0926371314.

Adding to 20144216 its reverse (61244102), we get a palindrome (81388318).

The spelling of 20144216 in words is "twenty million, one hundred forty-four thousand, two hundred sixteen".