20080556 has 6 divisors (see below), whose sum is σ = 35140980. Its totient is φ = 10040276.

The previous prime is 20080537. The next prime is 20080573. The reversal of 20080556 is 65508002.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2510066 + ... + 2510073.

It is an arithmetic number, because the mean of its divisors is an integer number (5856830).

Almost surely, 2^20080556 is an apocalyptic number.

It is an amenable number.

20080556 is a deficient number, since it is larger than the sum of its proper divisors (15060424).

20080556 is a wasteful number, since it uses less digits than its factorization.

20080556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5020143 (or 5020141 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 20080556 is about 4481.1333387883. The cubic root of 20080556 is about 271.8057111666.

Adding to 20080556 its reverse (65508002), we get a palindrome (85588558).

The spelling of 20080556 in words is "twenty million, eighty thousand, five hundred fifty-six".