20043128 has 16 divisors (see below), whose sum is σ = 42949680. Its totient is φ = 8589888.

The previous prime is 20043083. The next prime is 20043151. The reversal of 20043128 is 82134002.

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, 178901 + ... + 179012.

It is an arithmetic number, because the mean of its divisors is an integer number (2684355).

Almost surely, 2^20043128 is an apocalyptic number.

20043128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20043128 is an abundant number, since it is smaller than the sum of its proper divisors (22906552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20043128 is a wasteful number, since it uses less digits than its factorization.

20043128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357926 (or 357922 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20043128 is about 4476.9552153221. The cubic root of 20043128 is about 271.6367339188.

The spelling of 20043128 in words is "twenty million, forty-three thousand, one hundred twenty-eight".