22131311004 has 72 divisors (see below), whose sum is σ = 61146474480. Its totient is φ = 6693523200.

The previous prime is 22131310963. The next prime is 22131311039. The reversal of 22131311004 is 40011313122.

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

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 152682 + ... + 259950.

It is an arithmetic number, because the mean of its divisors is an integer number (849256590).

Almost surely, 2^22131311004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22131311004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30573237240).

22131311004 is an abundant number, since it is smaller than the sum of its proper divisors (39015163476).

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

22131311004 is a wasteful number, since it uses less digits than its factorization.

22131311004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107811 (or 107806 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 22131311004 its reverse (40011313122), we get a palindrome (62142624126).

The spelling of 22131311004 in words is "twenty-two billion, one hundred thirty-one million, three hundred eleven thousand, four".