20580907 has 4 divisors (see below), whose sum is σ = 20969280. Its totient is φ = 20192536.

The previous prime is 20580899. The next prime is 20580919. The reversal of 20580907 is 70908502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20580907 - 2³ = 20580899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20580947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194107 + ... + 194212.

It is an arithmetic number, because the mean of its divisors is an integer number (5242320).

Almost surely, 2^20580907 is an apocalyptic number.

20580907 is a deficient number, since it is larger than the sum of its proper divisors (388373).

20580907 is an equidigital number, since it uses as much as digits as its factorization.

20580907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388372.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 20580907 is about 4536.6184543115. The cubic root of 20580907 is about 274.0447606560.

The spelling of 20580907 in words is "twenty million, five hundred eighty thousand, nine hundred seven".