20000539 has 4 divisors (see below), whose sum is σ = 21539056. Its totient is φ = 18462024.

The previous prime is 20000537. The next prime is 20000543. The reversal of 20000539 is 93500002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20000539 - 2¹ = 20000537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20000531) 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, 769239 + ... + 769264.

It is an arithmetic number, because the mean of its divisors is an integer number (5384764).

Almost surely, 2^20000539 is an apocalyptic number.

20000539 is a deficient number, since it is larger than the sum of its proper divisors (1538517).

20000539 is a wasteful number, since it uses less digits than its factorization.

20000539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538516.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 20000539 is about 4472.1962166256. The cubic root of 20000539 is about 271.4442000894. Note that the first 3 decimals are identical.

The spelling of 20000539 in words is "twenty million, five hundred thirty-nine", and thus it is an aban number.