18442641 has 8 divisors (see below), whose sum is σ = 28103104. Its totient is φ = 10538640.

The previous prime is 18442639. The next prime is 18442663. The reversal of 18442641 is 14624481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18442641 - 2¹ = 18442639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18442599 and 18442608.

It is not an unprimeable number, because it can be changed into a prime (18442601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439090 + ... + 439131.

It is an arithmetic number, because the mean of its divisors is an integer number (3512888).

Almost surely, 2^18442641 is an apocalyptic number.

It is an amenable number.

18442641 is a deficient number, since it is larger than the sum of its proper divisors (9660463).

18442641 is an equidigital number, since it uses as much as digits as its factorization.

18442641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878231.

The product of its digits is 6144, while the sum is 30.

The square root of 18442641 is about 4294.4896087894. The cubic root of 18442641 is about 264.2050031879.

The spelling of 18442641 in words is "eighteen million, four hundred forty-two thousand, six hundred forty-one".