20582661 has 8 divisors (see below), whose sum is σ = 29938464. Its totient is φ = 12474320.

The previous prime is 20582647. The next prime is 20582669. The reversal of 20582661 is 16628502.

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 20582661 - 2¹⁹ = 20058373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20582669) 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, 311826 + ... + 311891.

It is an arithmetic number, because the mean of its divisors is an integer number (3742308).

Almost surely, 2^20582661 is an apocalyptic number.

It is an amenable number.

20582661 is a deficient number, since it is larger than the sum of its proper divisors (9355803).

20582661 is a wasteful number, since it uses less digits than its factorization.

20582661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623731.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 20582661 is about 4536.8117659872. The cubic root of 20582661 is about 274.0525455551.

The spelling of 20582661 in words is "twenty million, five hundred eighty-two thousand, six hundred sixty-one".