20585949 has 32 divisors (see below), whose sum is σ = 30497280. Its totient is φ = 12301632.

The previous prime is 20585947. The next prime is 20585993. The reversal of 20585949 is 94958502.

It is not a de Polignac number, because 20585949 - 2¹ = 20585947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20585949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20585941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90574 + ... + 90800.

It is an arithmetic number, because the mean of its divisors is an integer number (953040).

Almost surely, 2^20585949 is an apocalyptic number.

It is an amenable number.

20585949 is a deficient number, since it is larger than the sum of its proper divisors (9911331).

20585949 is a wasteful number, since it uses less digits than its factorization.

20585949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 20585949 is about 4537.1741205292. The cubic root of 20585949 is about 274.0671377207.

The spelling of 20585949 in words is "twenty million, five hundred eighty-five thousand, nine hundred forty-nine".