20580885 has 48 divisors (see below), whose sum is σ = 39871104. Its totient is φ = 10124352.

The previous prime is 20580881. The next prime is 20580887. The reversal of 20580885 is 58808502.

It is not a de Polignac number, because 20580885 - 2² = 20580881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20580881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15144 + ... + 16446.

It is an arithmetic number, because the mean of its divisors is an integer number (830648).

Almost surely, 2^20580885 is an apocalyptic number.

It is an amenable number.

20580885 is a deficient number, since it is larger than the sum of its proper divisors (19290219).

20580885 is a wasteful number, since it uses less digits than its factorization.

20580885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336 (or 1324 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The square root of 20580885 is about 4536.6160295974. The cubic root of 20580885 is about 274.0446630090.

The spelling of 20580885 in words is "twenty million, five hundred eighty thousand, eight hundred eighty-five".