18825489 has 12 divisors (see below), whose sum is σ = 27927796. Its totient is φ = 12210912.

The previous prime is 18825451. The next prime is 18825493. The reversal of 18825489 is 98452881.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7935489 + 10890000 = 2817^2 + 3300^2 .

It is not a de Polignac number, because 18825489 - 2⁷ = 18825361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18825419) 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, 27934 + ... + 28599.

Almost surely, 2^18825489 is an apocalyptic number.

It is an amenable number.

18825489 is a deficient number, since it is larger than the sum of its proper divisors (9102307).

18825489 is a wasteful number, since it uses less digits than its factorization.

18825489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56576 (or 56573 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 18825489 is about 4338.8349818817. The cubic root of 18825489 is about 266.0206939259.

The spelling of 18825489 in words is "eighteen million, eight hundred twenty-five thousand, four hundred eighty-nine".