20808082 has 8 divisors (see below), whose sum is σ = 31251276. Its totient is φ = 10390992.

The previous prime is 20808079. The next prime is 20808101. The reversal of 20808082 is 28080802.

It can be written as a sum of positive squares in 2 ways, for example, as 20259001 + 549081 = 4501^2 + 741^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20808082.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4393 + ... + 7804.

Almost surely, 2^20808082 is an apocalyptic number.

20808082 is a deficient number, since it is larger than the sum of its proper divisors (10443194).

20808082 is a wasteful number, since it uses less digits than its factorization.

20808082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13052.

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 20808082 is about 4561.5876622071. The cubic root of 20808082 is about 275.0493883748.

Adding to 20808082 its reverse (28080802), we get a palindrome (48888884).

The spelling of 20808082 in words is "twenty million, eight hundred eight thousand, eighty-two".