22451444442 has 96 divisors (see below), whose sum is σ = 56034231552. Its totient is φ = 6364127232.

The previous prime is 22451444423. The next prime is 22451444539. The reversal of 22451444442 is 24444415422.

It is a junction number, because it is equal to n+sod(n) for n = 22451444397 and 22451444406.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8968563 + ... + 8971065.

It is an arithmetic number, because the mean of its divisors is an integer number (583689912).

Almost surely, 2^22451444442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22451444442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28017115776).

22451444442 is an abundant number, since it is smaller than the sum of its proper divisors (33582787110).

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

22451444442 is a wasteful number, since it uses less digits than its factorization.

22451444442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3052 (or 3049 counting only the distinct ones).

The product of its digits is 163840, while the sum is 36.

Adding to 22451444442 its reverse (24444415422), we get a palindrome (46895859864).

The spelling of 22451444442 in words is "twenty-two billion, four hundred fifty-one million, four hundred forty-four thousand, four hundred forty-two".