20310206 has 48 divisors (see below), whose sum is σ = 38265696. Its totient is φ = 8031744.

The previous prime is 20310197. The next prime is 20310209. The reversal of 20310206 is 60201302.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121535 + ... + 121701.

It is an arithmetic number, because the mean of its divisors is an integer number (797202).

Almost surely, 2^20310206 is an apocalyptic number.

20310206 is a deficient number, since it is larger than the sum of its proper divisors (17955490).

20310206 is a wasteful number, since it uses less digits than its factorization.

20310206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20310206 is about 4506.6845906941. The cubic root of 20310206 is about 272.8379489723.

Adding to 20310206 its reverse (60201302), we get a palindrome (80511508).

The spelling of 20310206 in words is "twenty million, three hundred ten thousand, two hundred six".