18075229 has 4 divisors (see below), whose sum is σ = 18085084. Its totient is φ = 18065376.

The previous prime is 18075227. The next prime is 18075247. The reversal of 18075229 is 92257081.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92257081 = 7 ⋅13179583.

It can be written as a sum of positive squares in 2 ways, for example, as 16016004 + 2059225 = 4002^2 + 1435^2 .

It is a cyclic number.

It is not a de Polignac number, because 18075229 - 2¹ = 18075227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18075194 and 18075203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18075227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272 + ... + 6145.

It is an arithmetic number, because the mean of its divisors is an integer number (4521271).

Almost surely, 2^18075229 is an apocalyptic number.

It is an amenable number.

18075229 is a deficient number, since it is larger than the sum of its proper divisors (9855).

18075229 is an equidigital number, since it uses as much as digits as its factorization.

18075229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9854.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 18075229 is about 4251.4972656701. The cubic root of 18075229 is about 262.4387352112.

The spelling of 18075229 in words is "eighteen million, seventy-five thousand, two hundred twenty-nine".