20315206 has 8 divisors (see below), whose sum is σ = 30506040. Its totient is φ = 10146528.

The previous prime is 20315203. The next prime is 20315219. The reversal of 20315206 is 60251302.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315201) 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, 3016 + ... + 7051.

It is an arithmetic number, because the mean of its divisors is an integer number (3813255).

Almost surely, 2^20315206 is an apocalyptic number.

20315206 is a deficient number, since it is larger than the sum of its proper divisors (10190834).

20315206 is a wasteful number, since it uses less digits than its factorization.

20315206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11078.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20315206 is about 4507.2392880787. The cubic root of 20315206 is about 272.8603363674.

Adding to 20315206 its reverse (60251302), we get a palindrome (80566508).

The spelling of 20315206 in words is "twenty million, three hundred fifteen thousand, two hundred six".