18648125 has 10 divisors (see below), whose sum is σ = 23303478. Its totient is φ = 14918000.

The previous prime is 18648121. The next prime is 18648137. The reversal of 18648125 is 52184681.

It can be written as a sum of positive squares in 5 ways, for example, as 12630916 + 6017209 = 3554^2 + 2453^2 .

It is not a de Polignac number, because 18648125 - 2² = 18648121 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18648121) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 14294 + ... + 15543.

Almost surely, 2^18648125 is an apocalyptic number.

It is an amenable number.

18648125 is a deficient number, since it is larger than the sum of its proper divisors (4655353).

18648125 is an frugal number, since it uses more digits than its factorization.

18648125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29857 (or 29842 counting only the distinct ones).

The product of its digits is 15360, while the sum is 35.

The square root of 18648125 is about 4318.3474848604. The cubic root of 18648125 is about 265.1826200574.

The spelling of 18648125 in words is "eighteen million, six hundred forty-eight thousand, one hundred twenty-five".