18184061 has 4 divisors (see below), whose sum is σ = 20781792. Its totient is φ = 15586332.

The previous prime is 18184043. The next prime is 18184063. The reversal of 18184061 is 16048181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18184061 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18184063) 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, 1298855 + ... + 1298868.

It is an arithmetic number, because the mean of its divisors is an integer number (5195448).

Almost surely, 2^18184061 is an apocalyptic number.

It is an amenable number.

18184061 is a deficient number, since it is larger than the sum of its proper divisors (2597731).

18184061 is an equidigital number, since it uses as much as digits as its factorization.

18184061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597730.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 18184061 is about 4264.2773127460. The cubic root of 18184061 is about 262.9644012017.

The spelling of 18184061 in words is "eighteen million, one hundred eighty-four thousand, sixty-one".