20812176 has 120 divisors (see below), whose sum is σ = 72656064. Its totient is φ = 5402880.

The previous prime is 20812157. The next prime is 20812177. The reversal of 20812176 is 67121802.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (20812177) 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 23 ways as a sum of consecutive naturals, for example, 10150 + ... + 12026.

Almost surely, 2^20812176 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 20812176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36328032).

20812176 is an abundant number, since it is smaller than the sum of its proper divisors (51843888).

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

20812176 is a wasteful number, since it uses less digits than its factorization.

20812176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909 (or 1900 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 20812176 is about 4562.0363874042. The cubic root of 20812176 is about 275.0674258911.

Adding to 20812176 its reverse (67121802), we get a palindrome (87933978).

The spelling of 20812176 in words is "twenty million, eight hundred twelve thousand, one hundred seventy-six".