20808482 has 4 divisors (see below), whose sum is σ = 31212726. Its totient is φ = 10404240.

The previous prime is 20808481. The next prime is 20808497. The reversal of 20808482 is 28480802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16008001 + 4800481 = 4001^2 + 2191^2 .

It is not an unprimeable number, because it can be changed into a prime (20808481) 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 as a sum of consecutive naturals, namely, 5202119 + ... + 5202122.

Almost surely, 2^20808482 is an apocalyptic number.

20808482 is a deficient number, since it is larger than the sum of its proper divisors (10404244).

20808482 is a wasteful number, since it uses less digits than its factorization.

20808482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10404243.

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 20808482 is about 4561.6315063801. The cubic root of 20808482 is about 275.0511508158.

The spelling of 20808482 in words is "twenty million, eight hundred eight thousand, four hundred eighty-two".