20311206 has 8 divisors (see below), whose sum is σ = 40622424. Its totient is φ = 6770400.

The previous prime is 20311189. The next prime is 20311211. The reversal of 20311206 is 60211302.

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

20311206 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1692595 + ... + 1692606.

It is an arithmetic number, because the mean of its divisors is an integer number (5077803).

Almost surely, 2^20311206 is an apocalyptic number.

20311206 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20311206 is a wasteful number, since it uses less digits than its factorization.

20311206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385206.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 20311206 is about 4506.7955356328. The cubic root of 20311206 is about 272.8424267453.

Adding to 20311206 its reverse (60211302), we get a palindrome (80522508).

The spelling of 20311206 in words is "twenty million, three hundred eleven thousand, two hundred six".