20179216 has 40 divisors (see below), whose sum is σ = 42184800. Its totient is φ = 9319680.

The previous prime is 20179189. The next prime is 20179217. The reversal of 20179216 is 61297102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20179217) 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, 11655 + ... + 13273.

It is an arithmetic number, because the mean of its divisors is an integer number (1054620).

Almost surely, 2^20179216 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 20179216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21092400).

20179216 is an abundant number, since it is smaller than the sum of its proper divisors (22005584).

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

20179216 is a wasteful number, since it uses less digits than its factorization.

20179216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687 (or 1681 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 20179216 is about 4492.1282261307. The cubic root of 20179216 is about 272.2501303487.

The spelling of 20179216 in words is "twenty million, one hundred seventy-nine thousand, two hundred sixteen".