19885441 has 8 divisors (see below), whose sum is σ = 20329704. Its totient is φ = 19443840.

The previous prime is 19885433. The next prime is 19885447. The reversal of 19885441 is 14458891.

It can be written as a sum of positive squares in 4 ways, for example, as 6225025 + 13660416 = 2495^2 + 3696^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 19885441 - 2³ = 19885433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19885394 and 19885403.

It is not an unprimeable number, because it can be changed into a prime (19885447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23811 + ... + 24631.

It is an arithmetic number, because the mean of its divisors is an integer number (2541213).

Almost surely, 2^19885441 is an apocalyptic number.

It is an amenable number.

19885441 is a deficient number, since it is larger than the sum of its proper divisors (444263).

19885441 is an equidigital number, since it uses as much as digits as its factorization.

19885441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its digits is 46080, while the sum is 40.

The square root of 19885441 is about 4459.3094756924. The cubic root of 19885441 is about 270.9225006807.

The spelling of 19885441 in words is "nineteen million, eight hundred eighty-five thousand, four hundred forty-one".