18002250 has 160 divisors (see below), whose sum is σ = 57987072. Its totient is φ = 4082400.

The previous prime is 18002249. The next prime is 18002273. The reversal of 18002250 is 5220081.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 141687 + ... + 141813.

It is a vampire number, since it can be written as 2250 ⋅ 8001 (with its own digits).

Almost surely, 2^18002250 is an apocalyptic number.

18002250 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 18002250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28993536).

18002250 is an abundant number, since it is smaller than the sum of its proper divisors (39984822).

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

18002250 is a wasteful number, since it uses less digits than its factorization.

18002250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 18002250 is about 4242.9058438763. The cubic root of 18002250 is about 262.0850587217.

The spelling of 18002250 in words is "eighteen million, two thousand, two hundred fifty".