20557112 has 16 divisors (see below), whose sum is σ = 38601360. Its totient is φ = 10263424.

The previous prime is 20557099. The next prime is 20557129. The reversal of 20557112 is 21175502.

It is a happy number.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 5648 + ... + 8544.

It is an arithmetic number, because the mean of its divisors is an integer number (2412585).

Almost surely, 2^20557112 is an apocalyptic number.

It is an amenable number.

20557112 is a deficient number, since it is larger than the sum of its proper divisors (18044248).

20557112 is a wasteful number, since it uses less digits than its factorization.

20557112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3790 (or 3786 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 20557112 is about 4533.9951477698. The cubic root of 20557112 is about 273.9391059379.

The spelling of 20557112 in words is "twenty million, five hundred fifty-seven thousand, one hundred twelve".