19442500003878 has 64 divisors (see below), whose sum is σ = 44874958044672. Its totient is φ = 5500886112000.

The previous prime is 19442500003769. The next prime is 19442500003879. The reversal of 19442500003878 is 87830000524491.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 19442500003878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19442500003879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3506551 + ... + 7154082.

It is an arithmetic number, because the mean of its divisors is an integer number (701171219448).

Almost surely, 2^{19442500003878} is an apocalyptic number.

19442500003878 is an abundant number, since it is smaller than the sum of its proper divisors (25432458040794).

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

19442500003878 is a wasteful number, since it uses less digits than its factorization.

19442500003878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10661069.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 19442500003878 in words is "nineteen trillion, four hundred forty-two billion, five hundred million, three thousand, eight hundred seventy-eight".