22421123440 has 40 divisors (see below), whose sum is σ = 52201748160. Its totient is φ = 8955952896.

The previous prime is 22421123437. The next prime is 22421123453. The reversal of 22421123440 is 4432112422.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137379 + ... + 252418.

It is an arithmetic number, because the mean of its divisors is an integer number (1305043704).

Almost surely, 2^22421123440 is an apocalyptic number.

22421123440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22421123440 is an abundant number, since it is smaller than the sum of its proper divisors (29780624720).

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

22421123440 is a wasteful number, since it uses less digits than its factorization.

22421123440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390529 (or 390523 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 22421123440 its reverse (4432112422), we get a palindrome (26853235862).

The spelling of 22421123440 in words is "twenty-two billion, four hundred twenty-one million, one hundred twenty-three thousand, four hundred forty".