20580671 has 4 divisors (see below), whose sum is σ = 20862672. Its totient is φ = 20298672.

The previous prime is 20580649. The next prime is 20580673. The reversal of 20580671 is 17608502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17608502 = 2 ⋅8804251.

It is not a de Polignac number, because 20580671 - 2¹⁴ = 20564287 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 (20580673) 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 3 ways as a sum of consecutive naturals, for example, 140891 + ... + 141036.

It is an arithmetic number, because the mean of its divisors is an integer number (5215668).

Almost surely, 2^20580671 is an apocalyptic number.

20580671 is a deficient number, since it is larger than the sum of its proper divisors (282001).

20580671 is an equidigital number, since it uses as much as digits as its factorization.

20580671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282000.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 20580671 is about 4536.5924436740. The cubic root of 20580671 is about 274.0437131671.

The spelling of 20580671 in words is "twenty million, five hundred eighty thousand, six hundred seventy-one".