18343272 has 32 divisors (see below), whose sum is σ = 48556800. Its totient is φ = 5754624.

The previous prime is 18343271. The next prime is 18343279. The reversal of 18343272 is 27234381.

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

It is not an unprimeable number, because it can be changed into a prime (18343271) 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 7 ways as a sum of consecutive naturals, for example, 22072 + ... + 22887.

It is an arithmetic number, because the mean of its divisors is an integer number (1517400).

Almost surely, 2^18343272 is an apocalyptic number.

18343272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18343272 is an abundant number, since it is smaller than the sum of its proper divisors (30213528).

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

18343272 is a wasteful number, since it uses less digits than its factorization.

18343272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44985 (or 44981 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 18343272 is about 4282.9046218659. The cubic root of 18343272 is about 263.7296359771.

The spelling of 18343272 in words is "eighteen million, three hundred forty-three thousand, two hundred seventy-two".