20585408 has 14 divisors (see below), whose sum is σ = 40849296. Its totient is φ = 10292672.

The previous prime is 20585399. The next prime is 20585429. The reversal of 20585408 is 80458502.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 160760 + ... + 160887.

Almost surely, 2^20585408 is an apocalyptic number.

It is an amenable number.

20585408 is a deficient number, since it is larger than the sum of its proper divisors (20263888).

20585408 is an equidigital number, since it uses as much as digits as its factorization.

20585408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321659 (or 321649 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 20585408 is about 4537.1145015307. The cubic root of 20585408 is about 274.0647368659.

The spelling of 20585408 in words is "twenty million, five hundred eighty-five thousand, four hundred eight".