18201330 has 96 divisors (see below), whose sum is σ = 54722304. Its totient is φ = 4111488.

The previous prime is 18201329. The next prime is 18201343. The reversal of 18201330 is 3310281.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 105124 + ... + 105296.

It is an arithmetic number, because the mean of its divisors is an integer number (570024).

Almost surely, 2^18201330 is an apocalyptic number.

18201330 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 18201330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27361152).

18201330 is an abundant number, since it is smaller than the sum of its proper divisors (36520974).

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

18201330 is a wasteful number, since it uses less digits than its factorization.

18201330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 18201330 is about 4266.3016770969. The cubic root of 18201330 is about 263.0476186866.

The spelling of 18201330 in words is "eighteen million, two hundred one thousand, three hundred thirty".