20547085 has 8 divisors (see below), whose sum is σ = 26553240. Its totient is φ = 15173184.

The previous prime is 20547083. The next prime is 20547089. The reversal of 20547085 is 58074502.

It can be written as a sum of positive squares in 4 ways, for example, as 1633284 + 18913801 = 1278^2 + 4349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20547085 - 2¹ = 20547083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20547083) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 157990 + ... + 158119.

It is an arithmetic number, because the mean of its divisors is an integer number (3319155).

Almost surely, 2^20547085 is an apocalyptic number.

It is an amenable number.

20547085 is a deficient number, since it is larger than the sum of its proper divisors (6006155).

20547085 is a wasteful number, since it uses less digits than its factorization.

20547085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316127.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 20547085 is about 4532.8892552102. The cubic root of 20547085 is about 273.8945595682.

The spelling of 20547085 in words is "twenty million, five hundred forty-seven thousand, eighty-five".