18026250 has 160 divisors (see below), whose sum is σ = 53982720. Its totient is φ = 3960000.

The previous prime is 18026249. The next prime is 18026257. The reversal of 18026250 is 5262081.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18026250.

It is not an unprimeable number, because it can be changed into a prime (18026257) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 783739 + ... + 783761.

It is an arithmetic number, because the mean of its divisors is an integer number (337392).

Almost surely, 2^18026250 is an apocalyptic number.

18026250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18026250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26991360).

18026250 is an abundant number, since it is smaller than the sum of its proper divisors (35956470).

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

18026250 is a wasteful number, since it uses less digits than its factorization.

18026250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 18026250 is about 4245.7331522365. The cubic root of 18026250 is about 262.2014746930.

The spelling of 18026250 in words is "eighteen million, twenty-six thousand, two hundred fifty".