21482089 has 8 divisors (see below), whose sum is σ = 22121928. Its totient is φ = 20845440.

The previous prime is 21482081. The next prime is 21482093. The reversal of 21482089 is 98028412.

It can be written as a sum of positive squares in 4 ways, for example, as 2862864 + 18619225 = 1692^2 + 4315^2 .

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 21482089 - 2³ = 21482081 is a prime.

It is a super-2 number, since 2×21482089² = 922960295607842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21482081) 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, 22359 + ... + 23299.

It is an arithmetic number, because the mean of its divisors is an integer number (2765241).

Almost surely, 2^21482089 is an apocalyptic number.

It is an amenable number.

21482089 is a deficient number, since it is larger than the sum of its proper divisors (639839).

21482089 is an equidigital number, since it uses as much as digits as its factorization.

21482089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 21482089 is about 4634.8774525331. The cubic root of 21482089 is about 277.9876510568.

The spelling of 21482089 in words is "twenty-one million, four hundred eighty-two thousand, eighty-nine".