18306041 has 12 divisors (see below), whose sum is σ = 20210148. Its totient is φ = 16477344.

The previous prime is 18306037. The next prime is 18306053. The reversal of 18306041 is 14060381.

It can be written as a sum of positive squares in 2 ways, for example, as 7678441 + 10627600 = 2771^2 + 3260^2 .

It is not a de Polignac number, because 18306041 - 2² = 18306037 is a prime.

It is a super-2 number, since 2×18306041² = 670222274187362, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18305998 and 18306016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18306011) 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, 112226 + ... + 112388.

It is an arithmetic number, because the mean of its divisors is an integer number (1684179).

Almost surely, 2^18306041 is an apocalyptic number.

It is an amenable number.

18306041 is a deficient number, since it is larger than the sum of its proper divisors (1904107).

18306041 is an equidigital number, since it uses as much as digits as its factorization.

18306041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 18306041 is about 4278.5559479806. Note that the first 3 decimals coincide. The cubic root of 18306041 is about 263.5510860675.

The spelling of 18306041 in words is "eighteen million, three hundred six thousand, forty-one".