20311320222 has 24 divisors (see below), whose sum is σ = 44026623576. Its totient is φ = 6767553456.

The previous prime is 20311320181. The next prime is 20311320269. The reversal of 20311320222 is 22202311302.

It is a super-2 number, since 2×20311320222² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20311320195 and 20311320204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196948 + ... + 281799.

It is an arithmetic number, because the mean of its divisors is an integer number (1834442649).

Almost surely, 2^20311320222 is an apocalyptic number.

20311320222 is an abundant number, since it is smaller than the sum of its proper divisors (23715303354).

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

20311320222 is a wasteful number, since it uses less digits than its factorization.

20311320222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481112 (or 481109 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20311320222 its reverse (22202311302), we get a palindrome (42513631524).

The spelling of 20311320222 in words is "twenty billion, three hundred eleven million, three hundred twenty thousand, two hundred twenty-two".