20311130222 has 32 divisors (see below), whose sum is σ = 32417988480. Its totient is φ = 9511144960.

The previous prime is 20311130183. The next prime is 20311130227. The reversal of 20311130222 is 22203111302.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 20311130222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311130227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7748072 + ... + 7750692.

It is an arithmetic number, because the mean of its divisors is an integer number (1013062140).

Almost surely, 2^20311130222 is an apocalyptic number.

20311130222 is a deficient number, since it is larger than the sum of its proper divisors (12106858258).

20311130222 is a wasteful number, since it uses less digits than its factorization.

20311130222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3676.

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

Adding to 20311130222 its reverse (22203111302), we get a palindrome (42514241524).

It can be divided in two parts, 203111302 and 22, that multiplied together give a palindrome (4468448644).

The spelling of 20311130222 in words is "twenty billion, three hundred eleven million, one hundred thirty thousand, two hundred twenty-two".