18661341 has 4 divisors (see below), whose sum is σ = 24881792. Its totient is φ = 12440892.

The previous prime is 18661339. The next prime is 18661369. The reversal of 18661341 is 14316681.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14316681 = 3 ⋅4772227.

It is not a de Polignac number, because 18661341 - 2¹ = 18661339 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 18661299 and 18661308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18663341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3110221 + ... + 3110226.

It is an arithmetic number, because the mean of its divisors is an integer number (6220448).

Almost surely, 2^18661341 is an apocalyptic number.

It is an amenable number.

18661341 is a deficient number, since it is larger than the sum of its proper divisors (6220451).

18661341 is an equidigital number, since it uses as much as digits as its factorization.

18661341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6220450.

The product of its digits is 3456, while the sum is 30.

The square root of 18661341 is about 4319.8774288167. The cubic root of 18661341 is about 265.2452505884.

The spelling of 18661341 in words is "eighteen million, six hundred sixty-one thousand, three hundred forty-one".