18123525 has 72 divisors (see below), whose sum is σ = 38223744. Its totient is φ = 8035200.

The previous prime is 18123503. The next prime is 18123557. The reversal of 18123525 is 52532181.

It is a happy number.

18123525 is a `hidden beast` number, since 18 + 123 + 525 = 666.

It is not a de Polignac number, because 18123525 - 2⁵ = 18123493 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 58120 + ... + 58430.

Almost surely, 2^18123525 is an apocalyptic number.

18123525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18123525 is an abundant number, since it is smaller than the sum of its proper divisors (20100219).

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

18123525 is a wasteful number, since it uses less digits than its factorization.

18123525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371 (or 363 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 18123525 is about 4257.1733579924. The cubic root of 18123525 is about 262.6722678754.

The spelling of 18123525 in words is "eighteen million, one hundred twenty-three thousand, five hundred twenty-five".