20311013222 has 4 divisors (see below), whose sum is σ = 30466519836. Its totient is φ = 10155506610.

The previous prime is 20311013197. The next prime is 20311013257. The reversal of 20311013222 is 22231011302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22231011302 = 2 ⋅11115505651.

It is a self number, because there is not a number n which added to its sum of digits gives 20311013222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5077753304 + ... + 5077753307.

It is an arithmetic number, because the mean of its divisors is an integer number (7616629959).

Almost surely, 2^20311013222 is an apocalyptic number.

20311013222 is a deficient number, since it is larger than the sum of its proper divisors (10155506614).

20311013222 is a wasteful number, since it uses less digits than its factorization.

20311013222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10155506613.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20311013222 its reverse (22231011302), we get a palindrome (42542024524).

The spelling of 20311013222 in words is "twenty billion, three hundred eleven million, thirteen thousand, two hundred twenty-two".