20587071 has 16 divisors (see below), whose sum is σ = 28748160. Its totient is φ = 13087200.

The previous prime is 20587037. The next prime is 20587079. The reversal of 20587071 is 17078502.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20587071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20587079) 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 15 ways as a sum of consecutive naturals, for example, 5796 + ... + 8646.

It is an arithmetic number, because the mean of its divisors is an integer number (1796760).

Almost surely, 2^20587071 is an apocalyptic number.

20587071 is a deficient number, since it is larger than the sum of its proper divisors (8161089).

20587071 is a wasteful number, since it uses less digits than its factorization.

20587071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2966.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 20587071 is about 4537.2977640882. The cubic root of 20587071 is about 274.0721168085.

The spelling of 20587071 in words is "twenty million, five hundred eighty-seven thousand, seventy-one".