20311111406 has 16 divisors (see below), whose sum is σ = 30557329920. Its totient is φ = 10125356640.

The previous prime is 20311111357. The next prime is 20311111451. The reversal of 20311111406 is 60411111302.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3083036 + ... + 3089616.

It is an arithmetic number, because the mean of its divisors is an integer number (1909833120).

Almost surely, 2^20311111406 is an apocalyptic number.

20311111406 is a deficient number, since it is larger than the sum of its proper divisors (10246218514).

20311111406 is a wasteful number, since it uses less digits than its factorization.

20311111406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10939.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20311111406 its reverse (60411111302), we get a palindrome (80722222708).

The spelling of 20311111406 in words is "twenty billion, three hundred eleven million, one hundred eleven thousand, four hundred six".