20010216 has 16 divisors (see below), whose sum is σ = 50025600. Its totient is φ = 6670064.

The previous prime is 20010209. The next prime is 20010217. The reversal of 20010216 is 61201002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (20010217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416856 + ... + 416903.

It is an arithmetic number, because the mean of its divisors is an integer number (3126600).

Almost surely, 2^20010216 is an apocalyptic number.

It is an amenable number.

20010216 is an abundant number, since it is smaller than the sum of its proper divisors (30015384).

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

20010216 is a wasteful number, since it uses less digits than its factorization.

20010216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833768 (or 833764 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20010216 is about 4473.2779927029. The cubic root of 20010216 is about 271.4879712764.

Adding to 20010216 its reverse (61201002), we get a palindrome (81211218).

The spelling of 20010216 in words is "twenty million, ten thousand, two hundred sixteen".