18428925 has 12 divisors (see below), whose sum is σ = 30469280. Its totient is φ = 9828720.

The previous prime is 18428909. The next prime is 18428929. The reversal of 18428925 is 52982481.

It is not a de Polignac number, because 18428925 - 2⁴ = 18428909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18428929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122785 + ... + 122934.

Almost surely, 2^18428925 is an apocalyptic number.

18428925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18428925 is a deficient number, since it is larger than the sum of its proper divisors (12040355).

18428925 is a wasteful number, since it uses less digits than its factorization.

18428925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245732 (or 245727 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 18428925 is about 4292.8923816001. The cubic root of 18428925 is about 264.1394895311.

The spelling of 18428925 in words is "eighteen million, four hundred twenty-eight thousand, nine hundred twenty-five".