22234142440 has 64 divisors (see below), whose sum is σ = 51243192000. Its totient is φ = 8677842432.

The previous prime is 22234142429. The next prime is 22234142449. The reversal of 22234142440 is 4424143222.

It is a junction number, because it is equal to n+sod(n) for n = 22234142399 and 22234142408.

It is not an unprimeable number, because it can be changed into a prime (22234142449) 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, 1798119 + ... + 1810441.

It is an arithmetic number, because the mean of its divisors is an integer number (800674875).

Almost surely, 2^22234142440 is an apocalyptic number.

22234142440 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 22234142440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25621596000).

22234142440 is an abundant number, since it is smaller than the sum of its proper divisors (29009049560).

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

22234142440 is a wasteful number, since it uses less digits than its factorization.

22234142440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13426 (or 13422 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 22234142440 its reverse (4424143222), we get a palindrome (26658285662).

The spelling of 22234142440 in words is "twenty-two billion, two hundred thirty-four million, one hundred forty-two thousand, four hundred forty".