19922380685944 has 96 divisors (see below), whose sum is σ = 43660869557760. Its totient is φ = 8486362818560.

The previous prime is 19922380685941. The next prime is 19922380685959. The reversal of 19922380685944 is 44958608322991.

It is a super-2 number, since 2×19922380685944² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19922380685941) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1236297 + ... + 6432199.

It is an arithmetic number, because the mean of its divisors is an integer number (454800724560).

Almost surely, 2^{19922380685944} 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 19922380685944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21830434778880).

19922380685944 is an abundant number, since it is smaller than the sum of its proper divisors (23738488871816).

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

19922380685944 is a wasteful number, since it uses less digits than its factorization.

19922380685944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5196181 (or 5196166 counting only the distinct ones).

The product of its (nonzero) digits is 268738560, while the sum is 70.

The spelling of 19922380685944 in words is "nineteen trillion, nine hundred twenty-two billion, three hundred eighty million, six hundred eighty-five thousand, nine hundred forty-four".