18149250 has 64 divisors (see below), whose sum is σ = 51787008. Its totient is φ = 4147200.

The previous prime is 18149249. The next prime is 18149279. The reversal of 18149250 is 5294181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3522 + ... + 6978.

It is an arithmetic number, because the mean of its divisors is an integer number (809172).

Almost surely, 2^18149250 is an apocalyptic number.

18149250 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 18149250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25893504).

18149250 is an abundant number, since it is smaller than the sum of its proper divisors (33637758).

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

18149250 is a wasteful number, since it uses less digits than its factorization.

18149250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3484 (or 3474 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 18149250 is about 4260.1936575700. The cubic root of 18149250 is about 262.7964903886.

The spelling of 18149250 in words is "eighteen million, one hundred forty-nine thousand, two hundred fifty".