18873825 has 48 divisors (see below), whose sum is σ = 33587136. Its totient is φ = 9318400.

The previous prime is 18873797. The next prime is 18873853. The reversal of 18873825 is 52837881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18873797) and next prime (18873853).

It is not a de Polignac number, because 18873825 - 2⁵ = 18873793 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 144010 + ... + 144140.

It is an arithmetic number, because the mean of its divisors is an integer number (699732).

Almost surely, 2^18873825 is an apocalyptic number.

18873825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18873825 is a deficient number, since it is larger than the sum of its proper divisors (14713311).

18873825 is a wasteful number, since it uses less digits than its factorization.

18873825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 269 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 18873825 is about 4344.4015698367. The cubic root of 18873825 is about 266.2481760549.

The spelling of 18873825 in words is "eighteen million, eight hundred seventy-three thousand, eight hundred twenty-five".