21041489 has 8 divisors (see below), whose sum is σ = 24386688. Its totient is φ = 17781120.

The previous prime is 21041479. The next prime is 21041513. The reversal of 21041489 is 98414012.

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

It is a de Polignac number, because none of the positive numbers 2^k-21041489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21041429) 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, 20672 + ... + 21665.

It is an arithmetic number, because the mean of its divisors is an integer number (3048336).

Almost surely, 2^21041489 is an apocalyptic number.

It is an amenable number.

21041489 is a deficient number, since it is larger than the sum of its proper divisors (3345199).

21041489 is an equidigital number, since it uses as much as digits as its factorization.

21041489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42415.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 21041489 is about 4587.1002823134. The cubic root of 21041489 is about 276.0739886004.

The spelling of 21041489 in words is "twenty-one million, forty-one thousand, four hundred eighty-nine".