16620212 has 36 divisors (see below), whose sum is σ = 35622720. Its totient is φ = 6746544.

The previous prime is 16620209. The next prime is 16620223. The reversal of 16620212 is 21202661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1493 + ... + 5955.

It is an arithmetic number, because the mean of its divisors is an integer number (989520).

Almost surely, 2^16620212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16620212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17811360).

16620212 is an abundant number, since it is smaller than the sum of its proper divisors (19002508).

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

16620212 is a wasteful number, since it uses less digits than its factorization.

16620212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500 (or 4491 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 16620212 is about 4076.7894230632. The cubic root of 16620212 is about 255.1989322977.

Adding to 16620212 its reverse (21202661), we get a palindrome (37822873).

The spelling of 16620212 in words is "sixteen million, six hundred twenty thousand, two hundred twelve".