20576808 has 128 divisors (see below), whose sum is σ = 67584000. Its totient is φ = 5676480.

The previous prime is 20576807. The next prime is 20576813. The reversal of 20576808 is 80867502.

20576808 is a `hidden beast` number, since 2 + 0 + 576 + 80 + 8 = 666.

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 (20576807) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 46653 + ... + 47091.

It is an arithmetic number, because the mean of its divisors is an integer number (528000).

Almost surely, 2^20576808 is an apocalyptic number.

20576808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20576808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33792000).

20576808 is an abundant number, since it is smaller than the sum of its proper divisors (47007192).

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

20576808 is a wasteful number, since it uses less digits than its factorization.

20576808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 20576808 is about 4536.1666636049. The cubic root of 20576808 is about 274.0265660568.

The spelling of 20576808 in words is "twenty million, five hundred seventy-six thousand, eight hundred eight".