20312705206 has 4 divisors (see below), whose sum is σ = 30469057812. Its totient is φ = 10156352602.

The previous prime is 20312705197. The next prime is 20312705207. The reversal of 20312705206 is 60250721302.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312705207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5078176300 + ... + 5078176303.

It is an arithmetic number, because the mean of its divisors is an integer number (7617264453).

Almost surely, 2^20312705206 is an apocalyptic number.

20312705206 is a deficient number, since it is larger than the sum of its proper divisors (10156352606).

20312705206 is a wasteful number, since it uses less digits than its factorization.

20312705206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10156352605.

The product of its (nonzero) digits is 5040, while the sum is 28.

The spelling of 20312705206 in words is "twenty billion, three hundred twelve million, seven hundred five thousand, two hundred six".