20585141 has 4 divisors (see below), whose sum is σ = 20594784. Its totient is φ = 20575500.

The previous prime is 20585129. The next prime is 20585167. The reversal of 20585141 is 14158502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14158502 = 2 ⋅7079251.

It is a cyclic number.

It is not a de Polignac number, because 20585141 - 2¹⁰ = 20584117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20585141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20585111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35 + ... + 6416.

It is an arithmetic number, because the mean of its divisors is an integer number (5148696).

Almost surely, 2^20585141 is an apocalyptic number.

It is an amenable number.

20585141 is a deficient number, since it is larger than the sum of its proper divisors (9643).

20585141 is an equidigital number, since it uses as much as digits as its factorization.

20585141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9642.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 20585141 is about 4537.0850774479. The cubic root of 20585141 is about 274.0635519554.

The spelling of 20585141 in words is "twenty million, five hundred eighty-five thousand, one hundred forty-one".