18841541 has 4 divisors (see below), whose sum is σ = 18865152. Its totient is φ = 18817932.

The previous prime is 18841517. The next prime is 18841549. The reversal of 18841541 is 14514881.

It is a happy number.

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-18841541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18841498 and 18841507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18841549) 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, 10565 + ... + 12218.

It is an arithmetic number, because the mean of its divisors is an integer number (4716288).

Almost surely, 2^18841541 is an apocalyptic number.

It is an amenable number.

18841541 is a deficient number, since it is larger than the sum of its proper divisors (23611).

18841541 is an equidigital number, since it uses as much as digits as its factorization.

18841541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23610.

The product of its digits is 5120, while the sum is 32.

The square root of 18841541 is about 4340.6843930422. The cubic root of 18841541 is about 266.0962820654.

The spelling of 18841541 in words is "eighteen million, eight hundred forty-one thousand, five hundred forty-one".