18243471 has 8 divisors (see below), whose sum is σ = 24345520. Its totient is φ = 12151872.

The previous prime is 18243457. The next prime is 18243509. The reversal of 18243471 is 17434281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18243471 - 2⁷ = 18243343 is a prime.

It is a super-3 number, since 3×18243471³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18243451) 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, 3525 + ... + 6993.

It is an arithmetic number, because the mean of its divisors is an integer number (3043190).

Almost surely, 2^18243471 is an apocalyptic number.

18243471 is a deficient number, since it is larger than the sum of its proper divisors (6102049).

18243471 is a wasteful number, since it uses less digits than its factorization.

18243471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5225.

The product of its digits is 5376, while the sum is 30.

The square root of 18243471 is about 4271.2376426511. The cubic root of 18243471 is about 263.2504710000.

The spelling of 18243471 in words is "eighteen million, two hundred forty-three thousand, four hundred seventy-one".