20313205 has 8 divisors (see below), whose sum is σ = 26591904. Its totient is φ = 14773200.

The previous prime is 20313203. The next prime is 20313229. The reversal of 20313205 is 50231302.

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

It is not a de Polignac number, because 20313205 - 2¹ = 20313203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184611 + ... + 184720.

It is an arithmetic number, because the mean of its divisors is an integer number (3323988).

Almost surely, 2^20313205 is an apocalyptic number.

It is an amenable number.

20313205 is a deficient number, since it is larger than the sum of its proper divisors (6278699).

20313205 is a wasteful number, since it uses less digits than its factorization.

20313205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369347.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 20313205 is about 4507.0173063790. The cubic root of 20313205 is about 272.8513773728.

Adding to 20313205 its reverse (50231302), we get a palindrome (70544507).

The spelling of 20313205 in words is "twenty million, three hundred thirteen thousand, two hundred five".