20105339 has 8 divisors (see below), whose sum is σ = 21546000. Its totient is φ = 18693376.

The previous prime is 20105333. The next prime is 20105341. The reversal of 20105339 is 93350102.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20105339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20105333) 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 7 ways as a sum of consecutive naturals, for example, 5714 + ... + 8535.

It is an arithmetic number, because the mean of its divisors is an integer number (2693250).

Almost surely, 2^20105339 is an apocalyptic number.

20105339 is a deficient number, since it is larger than the sum of its proper divisors (1440661).

20105339 is a wasteful number, since it uses less digits than its factorization.

20105339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14349.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 20105339 is about 4483.8977463809. The cubic root of 20105339 is about 271.9174841611.

The spelling of 20105339 in words is "twenty million, one hundred five thousand, three hundred thirty-nine".