22142320440 has 64 divisors (see below), whose sum is σ = 66488463360. Its totient is φ = 5899152000.

The previous prime is 22142320433. The next prime is 22142320469. The reversal of 22142320440 is 4402324122.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22142320440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45565 + ... + 215315.

It is an arithmetic number, because the mean of its divisors is an integer number (1038882240).

Almost surely, 2^22142320440 is an apocalyptic number.

22142320440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22142320440 is an abundant number, since it is smaller than the sum of its proper divisors (44346142920).

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

22142320440 is a wasteful number, since it uses less digits than its factorization.

22142320440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170852 (or 170848 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 22142320440 its reverse (4402324122), we get a palindrome (26544644562).

The spelling of 22142320440 in words is "twenty-two billion, one hundred forty-two million, three hundred twenty thousand, four hundred forty".