20585005 has 16 divisors (see below), whose sum is σ = 28304640. Its totient is φ = 14078592.

The previous prime is 20584997. The next prime is 20585017. The reversal of 20585005 is 50058502.

It is a cyclic number.

It is not a de Polignac number, because 20585005 - 2³ = 20584997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25041 + ... + 25849.

It is an arithmetic number, because the mean of its divisors is an integer number (1769040).

Almost surely, 2^20585005 is an apocalyptic number.

It is an amenable number.

20585005 is a deficient number, since it is larger than the sum of its proper divisors (7719635).

20585005 is an equidigital number, since it uses as much as digits as its factorization.

20585005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 20585005 is about 4537.0700898267. The cubic root of 20585005 is about 274.0629484015.

The spelling of 20585005 in words is "twenty million, five hundred eighty-five thousand, five".