18228343 has 12 divisors (see below), whose sum is σ = 21607560. Its totient is φ = 15327312.

The previous prime is 18228317. The next prime is 18228347. The reversal of 18228343 is 34382281.

It is not a de Polignac number, because 18228343 - 2⁹ = 18227831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18228347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 913 + ... + 6106.

It is an arithmetic number, because the mean of its divisors is an integer number (1800630).

Almost surely, 2^18228343 is an apocalyptic number.

18228343 is a deficient number, since it is larger than the sum of its proper divisors (3379217).

18228343 is an equidigital number, since it uses as much as digits as its factorization.

18228343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7086 (or 7079 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 18228343 is about 4269.4663600970. The cubic root of 18228343 is about 263.1776859761.

The spelling of 18228343 in words is "eighteen million, two hundred twenty-eight thousand, three hundred forty-three".