20776896 has 84 divisors (see below), whose sum is σ = 68074032. Its totient is φ = 5935104.

The previous prime is 20776849. The next prime is 20776897. The reversal of 20776896 is 69867702.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (84).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20776897) 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 11 ways as a sum of consecutive naturals, for example, 1456 + ... + 6608.

Almost surely, 2^20776896 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 20776896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34037016).

20776896 is an abundant number, since it is smaller than the sum of its proper divisors (47297136).

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

20776896 is a wasteful number, since it uses less digits than its factorization.

20776896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5178 (or 5165 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 20776896 is about 4558.1680530669. The cubic root of 20776896 is about 274.9119100774.

The spelling of 20776896 in words is "twenty million, seven hundred seventy-six thousand, eight hundred ninety-six".