20310406 has 16 divisors (see below), whose sum is σ = 30998880. Its totient is φ = 9979200.

The previous prime is 20310401. The next prime is 20310463. The reversal of 20310406 is 60401302.

It is a self number, because there is not a number n which added to its sum of digits gives 20310406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32610 + ... + 33226.

It is an arithmetic number, because the mean of its divisors is an integer number (1937430).

Almost surely, 2^20310406 is an apocalyptic number.

20310406 is a deficient number, since it is larger than the sum of its proper divisors (10688474).

20310406 is a wasteful number, since it uses less digits than its factorization.

20310406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20310406 is about 4506.7067799004. The cubic root of 20310406 is about 272.8388445387.

Adding to 20310406 its reverse (60401302), we get a palindrome (80711708).

It can be divided in two parts, 203 and 10406, that added together give a square (10609 = 103²).

The spelling of 20310406 in words is "twenty million, three hundred ten thousand, four hundred six".