18238041 has 10 divisors (see below), whose sum is σ = 27244602. Its totient is φ = 12158640.

The previous prime is 18238039. The next prime is 18238067. The reversal of 18238041 is 14083281.

It can be written as a sum of positive squares in only one way, i.e., 9363600 + 8874441 = 3060^2 + 2979^2 .

It is not a de Polignac number, because 18238041 - 2¹ = 18238039 is a prime.

It is a super-2 number, since 2×18238041² = 665252279035362, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18237996 and 18238014.

It is not an unprimeable number, because it can be changed into a prime (18238001) 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 9 ways as a sum of consecutive naturals, for example, 112500 + ... + 112661.

Almost surely, 2^18238041 is an apocalyptic number.

It is an amenable number.

18238041 is a deficient number, since it is larger than the sum of its proper divisors (9006561).

18238041 is an equidigital number, since it uses as much as digits as its factorization.

18238041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225173 (or 225164 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 18238041 is about 4270.6019482036. The cubic root of 18238041 is about 263.2243503877.

The spelling of 18238041 in words is "eighteen million, two hundred thirty-eight thousand, forty-one".