24221423440 has 160 divisors (see below), whose sum is σ = 61746048000. Its totient is φ = 8802017280.

The previous prime is 24221423437. The next prime is 24221423449. The reversal of 24221423440 is 4432412242.

It is a junction number, because it is equal to n+sod(n) for n = 24221423399 and 24221423408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24221423449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5322286 + ... + 5326834.

It is an arithmetic number, because the mean of its divisors is an integer number (385912800).

Almost surely, 2^24221423440 is an apocalyptic number.

24221423440 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 24221423440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30873024000).

24221423440 is an abundant number, since it is smaller than the sum of its proper divisors (37524624560).

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

24221423440 is a wasteful number, since it uses less digits than its factorization.

24221423440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4725 (or 4719 counting only the distinct ones).

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

Adding to 24221423440 its reverse (4432412242), we get a palindrome (28653835682).

The spelling of 24221423440 in words is "twenty-four billion, two hundred twenty-one million, four hundred twenty-three thousand, four hundred forty".