19941764422146 has 128 divisors (see below), whose sum is σ = 48182567731200. Its totient is φ = 5375012904000.

The previous prime is 19941764422123. The next prime is 19941764422193. The reversal of 19941764422146 is 64122446714991.

It is a self number, because there is not a number n which added to its sum of digits gives 19941764422146.

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 63 ways as a sum of consecutive naturals, for example, 1138284775 + ... + 1138302293.

It is an arithmetic number, because the mean of its divisors is an integer number (376426310400).

Almost surely, 2^{19941764422146} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19941764422146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24091283865600).

19941764422146 is an abundant number, since it is smaller than the sum of its proper divisors (28240803309054).

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

19941764422146 is a wasteful number, since it uses less digits than its factorization.

19941764422146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23484.

The product of its digits is 20901888, while the sum is 60.

The spelling of 19941764422146 in words is "nineteen trillion, nine hundred forty-one billion, seven hundred sixty-four million, four hundred twenty-two thousand, one hundred forty-six".