20776608 has 96 divisors (see below), whose sum is σ = 61387200. Its totient is φ = 6835968.

The previous prime is 20776607. The next prime is 20776619. The reversal of 20776608 is 80667702.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20776607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120010 + ... + 120182.

It is an arithmetic number, because the mean of its divisors is an integer number (639450).

Almost surely, 2^20776608 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 20776608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30693600).

20776608 is an abundant number, since it is smaller than the sum of its proper divisors (40610592).

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

20776608 is a wasteful number, since it uses less digits than its factorization.

20776608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 20776608 is about 4558.1364613184. The cubic root of 20776608 is about 274.9106398364.

The spelling of 20776608 in words is "twenty million, seven hundred seventy-six thousand, six hundred eight".