20336539 has 4 divisors (see below), whose sum is σ = 21532824. Its totient is φ = 19140256.

The previous prime is 20336513. The next prime is 20336543. The reversal of 20336539 is 93563302.

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 20336539 - 2⁹ = 20336027 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 20336539.

It is not an unprimeable number, because it can be changed into a prime (20336599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598117 + ... + 598150.

It is an arithmetic number, because the mean of its divisors is an integer number (5383206).

Almost surely, 2^20336539 is an apocalyptic number.

20336539 is a deficient number, since it is larger than the sum of its proper divisors (1196285).

20336539 is a wasteful number, since it uses less digits than its factorization.

20336539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196284.

The product of its (nonzero) digits is 14580, while the sum is 31.

The square root of 20336539 is about 4509.6051933623. The cubic root of 20336539 is about 272.9558131779.

The spelling of 20336539 in words is "twenty million, three hundred thirty-six thousand, five hundred thirty-nine".