18384234 has 16 divisors (see below), whose sum is σ = 40111200. Its totient is φ = 5570960.
The previous prime is 18384221. The next prime is 18384239. The reversal of 18384234 is 43248381.
It is a Harshad number since it is a multiple of its sum of digits (33).
It is a junction number, because it is equal to n+sod(n) for n = 18384195 and 18384204.
It is not an unprimeable number, because it can be changed into a prime (18384239) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139209 + ... + 139340.
It is an arithmetic number, because the mean of its divisors is an integer number (2506950).
Almost surely, 218384234 is an apocalyptic number.
18384234 is an abundant number, since it is smaller than the sum of its proper divisors (21726966).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18384234 is a wasteful number, since it uses less digits than its factorization.
18384234 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 278565.
The product of its digits is 18432, while the sum is 33.
The square root of 18384234 is about 4287.6839902213. The cubic root of 18384234 is about 263.9257998542.
The spelling of 18384234 in words is "eighteen million, three hundred eighty-four thousand, two hundred thirty-four".
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