20662489 has 8 divisors (see below), whose sum is σ = 21301280. Its totient is φ = 20030976.

The previous prime is 20662459. The next prime is 20662493. The reversal of 20662489 is 98426602.

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 20662489 - 2⁵ = 20662457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20662459) 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, 4249 + ... + 7705.

It is an arithmetic number, because the mean of its divisors is an integer number (2662660).

Almost surely, 2^20662489 is an apocalyptic number.

It is an amenable number.

20662489 is a deficient number, since it is larger than the sum of its proper divisors (638791).

20662489 is a wasteful number, since it uses less digits than its factorization.

20662489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3639.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 20662489 is about 4545.6010603659. The cubic root of 20662489 is about 274.4063845565.

The spelling of 20662489 in words is "twenty million, six hundred sixty-two thousand, four hundred eighty-nine".