22684384638 has 32 divisors (see below), whose sum is σ = 51236140320. Its totient is φ = 7437502080.

The previous prime is 22684384627. The next prime is 22684384651. The reversal of 22684384638 is 83648348622.

22684384638 is a `hidden beast` number, since 226 + 8 + 4 + 384 + 6 + 38 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3439995 + ... + 3446582.

It is an arithmetic number, because the mean of its divisors is an integer number (1601129385).

Almost surely, 2^22684384638 is an apocalyptic number.

22684384638 is an abundant number, since it is smaller than the sum of its proper divisors (28551755682).

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

22684384638 is a wasteful number, since it uses less digits than its factorization.

22684384638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6886649 (or 6886643 counting only the distinct ones).

The product of its digits is 10616832, while the sum is 54.

The spelling of 22684384638 in words is "twenty-two billion, six hundred eighty-four million, three hundred eighty-four thousand, six hundred thirty-eight".