20212776 has 48 divisors (see below), whose sum is σ = 55186560. Its totient is φ = 6683040.

The previous prime is 20212771. The next prime is 20212799. The reversal of 20212776 is 67721202.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20212771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8361 + ... + 10503.

It is an arithmetic number, because the mean of its divisors is an integer number (1149720).

Almost surely, 2^20212776 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 20212776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27593280).

20212776 is an abundant number, since it is smaller than the sum of its proper divisors (34973784).

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

20212776 is a wasteful number, since it uses less digits than its factorization.

20212776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286 (or 2279 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 20212776 is about 4495.8620975292. The cubic root of 20212776 is about 272.4009729115.

Adding to 20212776 its reverse (67721202), we get a palindrome (87933978).

The spelling of 20212776 in words is "twenty million, two hundred twelve thousand, seven hundred seventy-six".