22144698840 has 128 divisors (see below), whose sum is σ = 73073041920. Its totient is φ = 5368373120.

The previous prime is 22144698799. The next prime is 22144698841. The reversal of 22144698840 is 4889644122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22144698840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22144698841) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 90397 + ... + 229043.

It is an arithmetic number, because the mean of its divisors is an integer number (570883140).

Almost surely, 2^22144698840 is an apocalyptic number.

22144698840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22144698840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36536520960).

22144698840 is an abundant number, since it is smaller than the sum of its proper divisors (50928343080).

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

22144698840 is a wasteful number, since it uses less digits than its factorization.

22144698840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138694 (or 138668 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 48.

The spelling of 22144698840 in words is "twenty-two billion, one hundred forty-four million, six hundred ninety-eight thousand, eight hundred forty".