22681212428 has 12 divisors (see below), whose sum is σ = 45362424912. Its totient is φ = 9720519600.

The previous prime is 22681212419. The next prime is 22681212431. The reversal of 22681212428 is 82421218622.

22681212428 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 22681212391 and 22681212400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405021623 + ... + 405021678.

It is an arithmetic number, because the mean of its divisors is an integer number (3780202076).

Almost surely, 2^22681212428 is an apocalyptic number.

22681212428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22681212428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22681212428 is a wasteful number, since it uses less digits than its factorization.

22681212428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810043312 (or 810043310 counting only the distinct ones).

The product of its digits is 49152, while the sum is 38.

The spelling of 22681212428 in words is "twenty-two billion, six hundred eighty-one million, two hundred twelve thousand, four hundred twenty-eight".