18673841 has 4 divisors (see below), whose sum is σ = 18703092. Its totient is φ = 18644592.

The previous prime is 18673813. The next prime is 18673843. The reversal of 18673841 is 14837681.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13249600 + 5424241 = 3640^2 + 2329^2 .

It is a cyclic number.

It is not a de Polignac number, because 18673841 - 2⁶ = 18673777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18673795 and 18673804.

It is not an unprimeable number, because it can be changed into a prime (18673843) 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, 13646 + ... + 14951.

It is an arithmetic number, because the mean of its divisors is an integer number (4675773).

Almost surely, 2^18673841 is an apocalyptic number.

It is an amenable number.

18673841 is a deficient number, since it is larger than the sum of its proper divisors (29251).

18673841 is an equidigital number, since it uses as much as digits as its factorization.

18673841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29250.

The product of its digits is 32256, while the sum is 38.

The square root of 18673841 is about 4321.3239869281. The cubic root of 18673841 is about 265.3044607958.

The spelling of 18673841 in words is "eighteen million, six hundred seventy-three thousand, eight hundred forty-one".