20212116 has 24 divisors (see below), whose sum is σ = 49936320. Its totient is φ = 6340992.

The previous prime is 20212111. The next prime is 20212117. The reversal of 20212116 is 61121202.

It is a junction number, because it is equal to n+sod(n) for n = 20212095 and 20212104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212111) 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 7 ways as a sum of consecutive naturals, for example, 49336 + ... + 49743.

It is an arithmetic number, because the mean of its divisors is an integer number (2080680).

Almost surely, 2^20212116 is an apocalyptic number.

It is an amenable number.

20212116 is an abundant number, since it is smaller than the sum of its proper divisors (29724204).

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

20212116 is a wasteful number, since it uses less digits than its factorization.

20212116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99103 (or 99101 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 20212116 is about 4495.7886961022. The cubic root of 20212116 is about 272.3980080111.

Adding to 20212116 its reverse (61121202), we get a palindrome (81333318).

The spelling of 20212116 in words is "twenty million, two hundred twelve thousand, one hundred sixteen".