21460589 has 8 divisors (see below), whose sum is σ = 22103928. Its totient is φ = 20823040.

The previous prime is 21460577. The next prime is 21460591. The reversal of 21460589 is 98506412.

It can be written as a sum of positive squares in 4 ways, for example, as 5098564 + 16362025 = 2258^2 + 4045^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21460589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21460559) 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, 6749 + ... + 9405.

It is an arithmetic number, because the mean of its divisors is an integer number (2762991).

Almost surely, 2^21460589 is an apocalyptic number.

It is an amenable number.

21460589 is a deficient number, since it is larger than the sum of its proper divisors (643339).

21460589 is a wasteful number, since it uses less digits than its factorization.

21460589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2895.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 21460589 is about 4632.5575009923. The cubic root of 21460589 is about 277.8948802915.

The spelling of 21460589 in words is "twenty-one million, four hundred sixty thousand, five hundred eighty-nine".