18725128 has 32 divisors (see below), whose sum is σ = 36936000. Its totient is φ = 8882368.

The previous prime is 18725123. The next prime is 18725131. The reversal of 18725128 is 82152781.

It is a junction number, because it is equal to n+sod(n) for n = 18725093 and 18725102.

It is not an unprimeable number, because it can be changed into a prime (18725123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27075 + ... + 27757.

It is an arithmetic number, because the mean of its divisors is an integer number (1154250).

Almost surely, 2^18725128 is an apocalyptic number.

It is an amenable number.

18725128 is a deficient number, since it is larger than the sum of its proper divisors (18210872).

18725128 is a wasteful number, since it uses less digits than its factorization.

18725128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 857 counting only the distinct ones).

The product of its digits is 8960, while the sum is 34.

The square root of 18725128 is about 4327.2540946887. The cubic root of 18725128 is about 265.5471216767.

The spelling of 18725128 in words is "eighteen million, seven hundred twenty-five thousand, one hundred twenty-eight".