18380250 has 128 divisors (see below), whose sum is σ = 58406400. Its totient is φ = 4190400.

The previous prime is 18380249. The next prime is 18380251. The reversal of 18380250 is 5208381.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18380249) and next prime (18380251).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18380251) 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 63 ways as a sum of consecutive naturals, for example, 47056 + ... + 47444.

It is an arithmetic number, because the mean of its divisors is an integer number (456300).

Almost surely, 2^18380250 is an apocalyptic number.

18380250 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 18380250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29203200).

18380250 is an abundant number, since it is smaller than the sum of its proper divisors (40026150).

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

18380250 is a wasteful number, since it uses less digits than its factorization.

18380250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 18380250 is about 4287.2193785716. The cubic root of 18380250 is about 263.9067335835.

The spelling of 18380250 in words is "eighteen million, three hundred eighty thousand, two hundred fifty".