22143344240 has 40 divisors (see below), whose sum is σ = 52103571408. Its totient is φ = 8750620160.

The previous prime is 22143344233. The next prime is 22143344243. The reversal of 22143344240 is 4244334122.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×22143344240² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143344243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1660781 + ... + 1674060.

Almost surely, 2^22143344240 is an apocalyptic number.

22143344240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22143344240 is an abundant number, since it is smaller than the sum of its proper divisors (29960227168).

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

22143344240 is a wasteful number, since it uses less digits than its factorization.

22143344240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334937 (or 3334931 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 22143344240 its reverse (4244334122), we get a palindrome (26387678362).

The spelling of 22143344240 in words is "twenty-two billion, one hundred forty-three million, three hundred forty-four thousand, two hundred forty".