20827218 has 32 divisors (see below), whose sum is σ = 42771456. Its totient is φ = 6758928.

The previous prime is 20827199. The next prime is 20827241. The reversal of 20827218 is 81272802.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41155 + ... + 41657.

It is an arithmetic number, because the mean of its divisors is an integer number (1336608).

Almost surely, 2^20827218 is an apocalyptic number.

20827218 is an abundant number, since it is smaller than the sum of its proper divisors (21944238).

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

20827218 is a wasteful number, since it uses less digits than its factorization.

20827218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 20827218 is about 4563.6846955065. The cubic root of 20827218 is about 275.1336782588.

The spelling of 20827218 in words is "twenty million, eight hundred twenty-seven thousand, two hundred eighteen".