20706808 has 32 divisors (see below), whose sum is σ = 42652800. Its totient is φ = 9380448.

The previous prime is 20706797. The next prime is 20706809. The reversal of 20706808 is 80860702.

It is a self number, because there is not a number n which added to its sum of digits gives 20706808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20706809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535 + ... + 6457.

It is an arithmetic number, because the mean of its divisors is an integer number (1332900).

Almost surely, 2^20706808 is an apocalyptic number.

It is an amenable number.

20706808 is an abundant number, since it is smaller than the sum of its proper divisors (21945992).

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

20706808 is a wasteful number, since it uses less digits than its factorization.

20706808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5971 (or 5967 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 20706808 is about 4550.4733819681. The cubic root of 20706808 is about 274.6024359921.

The spelling of 20706808 in words is "twenty million, seven hundred six thousand, eight hundred eight".