18432243 has 6 divisors (see below), whose sum is σ = 26624364. Its totient is φ = 12288156.

The previous prime is 18432241. The next prime is 18432277. The reversal of 18432243 is 34223481.

It is not a de Polignac number, because 18432243 - 2¹ = 18432241 is a prime.

It is a super-2 number, since 2×18432243² = 679495164022098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18432241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1024005 + ... + 1024022.

It is an arithmetic number, because the mean of its divisors is an integer number (4437394).

Almost surely, 2^18432243 is an apocalyptic number.

18432243 is a deficient number, since it is larger than the sum of its proper divisors (8192121).

18432243 is a wasteful number, since it uses less digits than its factorization.

18432243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048033 (or 2048030 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 18432243 is about 4293.2788169417. The cubic root of 18432243 is about 264.1553407403.

The spelling of 18432243 in words is "eighteen million, four hundred thirty-two thousand, two hundred forty-three".