20557010 has 16 divisors (see below), whose sum is σ = 37863936. Its totient is φ = 8031408.

The previous prime is 20557003. The next prime is 20557013. The reversal of 20557010 is 1075502.

It is not an unprimeable number, because it can be changed into a prime (20557013) 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, 23474 + ... + 24333.

It is an arithmetic number, because the mean of its divisors is an integer number (2366496).

Almost surely, 2^20557010 is an apocalyptic number.

20557010 is a deficient number, since it is larger than the sum of its proper divisors (17306926).

20557010 is a wasteful number, since it uses less digits than its factorization.

20557010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47857.

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 20557010 is about 4533.9838993980. The cubic root of 20557010 is about 273.9386528614.

The spelling of 20557010 in words is "twenty million, five hundred fifty-seven thousand, ten".