21982091115228 has 24 divisors (see below), whose sum is σ = 51291671628288. Its totient is φ = 7327345748976.

The previous prime is 21982091115227. The next prime is 21982091115269. The reversal of 21982091115228 is 82251119028912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21982091115227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3430275 + ... + 7465317.

It is an arithmetic number, because the mean of its divisors is an integer number (2137152984512).

Almost surely, 2^{21982091115228} is an apocalyptic number.

It is an amenable number.

21982091115228 is an abundant number, since it is smaller than the sum of its proper divisors (29309580513060).

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

21982091115228 is a wasteful number, since it uses less digits than its factorization.

21982091115228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4489033 (or 4489031 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 51.

The spelling of 21982091115228 in words is "twenty-one trillion, nine hundred eighty-two billion, ninety-one million, one hundred fifteen thousand, two hundred twenty-eight".