20201216 has 36 divisors (see below), whose sum is σ = 46088112. Its totient is φ = 8656896.

The previous prime is 20201191. The next prime is 20201227. The reversal of 20201216 is 61210202.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a self number, because there is not a number n which added to its sum of digits gives 20201216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3845 + ... + 7428.

Almost surely, 2^20201216 is an apocalyptic number.

It is an amenable number.

20201216 is an abundant number, since it is smaller than the sum of its proper divisors (25886896).

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

20201216 is an equidigital number, since it uses as much as digits as its factorization.

20201216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11296 (or 11282 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 20201216 is about 4494.5762870375. The cubic root of 20201216 is about 272.3490328951.

Adding to 20201216 its reverse (61210202), we get a palindrome (81411418).

The spelling of 20201216 in words is "twenty million, two hundred one thousand, two hundred sixteen".