22156721076 has 96 divisors (see below), whose sum is σ = 59746514688. Its totient is φ = 6259737600.

The previous prime is 22156721057. The next prime is 22156721099. The reversal of 22156721076 is 67012765122.

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 31 ways as a sum of consecutive naturals, for example, 10290016 + ... + 10292168.

It is an arithmetic number, because the mean of its divisors is an integer number (622359528).

Almost surely, 2^22156721076 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22156721076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29873257344).

22156721076 is an abundant number, since it is smaller than the sum of its proper divisors (37589793612).

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

22156721076 is a wasteful number, since it uses less digits than its factorization.

22156721076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481 (or 3479 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 22156721076 in words is "twenty-two billion, one hundred fifty-six million, seven hundred twenty-one thousand, seventy-six".