20881441 has 8 divisors (see below), whose sum is σ = 24012224. Its totient is φ = 17787600.

The previous prime is 20881439. The next prime is 20881451. The reversal of 20881441 is 14418802.

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 20881441 - 2¹ = 20881439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20881451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8010 + ... + 10291.

It is an arithmetic number, because the mean of its divisors is an integer number (3001528).

Almost surely, 2^20881441 is an apocalyptic number.

It is an amenable number.

20881441 is a deficient number, since it is larger than the sum of its proper divisors (3130783).

20881441 is a wasteful number, since it uses less digits than its factorization.

20881441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18471.

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 20881441 is about 4569.6215379394. The cubic root of 20881441 is about 275.3722386121.

The spelling of 20881441 in words is "twenty million, eight hundred eighty-one thousand, four hundred forty-one".