20557082 has 16 divisors (see below), whose sum is σ = 37951872. Its totient is φ = 8132400.

The previous prime is 20557079. The next prime is 20557087. The reversal of 20557082 is 28075502.

It is not an unprimeable number, because it can be changed into a prime (20557087) 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 7 ways as a sum of consecutive naturals, for example, 56294 + ... + 56657.

It is an arithmetic number, because the mean of its divisors is an integer number (2371992).

Almost surely, 2^20557082 is an apocalyptic number.

20557082 is a deficient number, since it is larger than the sum of its proper divisors (17394790).

20557082 is a wasteful number, since it uses less digits than its factorization.

20557082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112973.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 20557082 is about 4533.9918394280. The cubic root of 20557082 is about 273.9389726802.

The spelling of 20557082 in words is "twenty million, five hundred fifty-seven thousand, eighty-two".