20587133 has 16 divisors (see below), whose sum is σ = 24434304. Its totient is φ = 16977600.

The previous prime is 20587123. The next prime is 20587141. The reversal of 20587133 is 33178502.

It is a cyclic number.

It is not a de Polignac number, because 20587133 - 2¹⁰ = 20586109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20587096 and 20587105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20587123) 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, 25766 + ... + 26552.

It is an arithmetic number, because the mean of its divisors is an integer number (1527144).

Almost surely, 2^20587133 is an apocalyptic number.

It is an amenable number.

20587133 is a deficient number, since it is larger than the sum of its proper divisors (3847171).

20587133 is a wasteful number, since it uses less digits than its factorization.

20587133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20587133 is about 4537.3045963435. The cubic root of 20587133 is about 274.0723919400.

The spelling of 20587133 in words is "twenty million, five hundred eighty-seven thousand, one hundred thirty-three".