18689000 has 64 divisors (see below), whose sum is σ = 47736000. Its totient is φ = 6792000.

The previous prime is 18688993. The next prime is 18689003. The reversal of 18689000 is 98681.

It is not an unprimeable number, because it can be changed into a prime (18689003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10151 + ... + 11849.

It is an arithmetic number, because the mean of its divisors is an integer number (745875).

Almost surely, 2^18689000 is an apocalyptic number.

18689000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18689000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23868000).

18689000 is an abundant number, since it is smaller than the sum of its proper divisors (29047000).

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

18689000 is a wasteful number, since it uses less digits than its factorization.

18689000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731 (or 1717 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 18689000 is about 4323.0776074459. The cubic root of 18689000 is about 265.3762307575.

The spelling of 18689000 in words is "eighteen million, six hundred eighty-nine thousand".