19722650694912 has 1440 divisors, whose sum is σ = 67694913538560. Its totient is φ = 5681401896960.

The previous prime is 19722650694883. The next prime is 19722650694937. The reversal of 19722650694912 is 21949605622791.

19722650694912 is a `hidden beast` number, since 1 + 9 + 7 + 2 + 26 + 506 + 94 + 9 + 12 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 19722650694912.

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 159 ways as a sum of consecutive naturals, for example, 120997856943 + ... + 120997857105.

It is an arithmetic number, because the mean of its divisors is an integer number (47010356624).

Almost surely, 2^{19722650694912} is an apocalyptic number.

19722650694912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19722650694912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33847456769280).

19722650694912 is an abundant number, since it is smaller than the sum of its proper divisors (47972262843648).

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

19722650694912 is an frugal number, since it uses more digits than its factorization.

19722650694912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 63.

The spelling of 19722650694912 in words is "nineteen trillion, seven hundred twenty-two billion, six hundred fifty million, six hundred ninety-four thousand, nine hundred twelve".