19446867878804 has 6 divisors (see below), whose sum is σ = 34032018787914. Its totient is φ = 9723433939400.

The previous prime is 19446867878773. The next prime is 19446867878807. The reversal of 19446867878804 is 40887876864491.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12975196452100 + 6471671426704 = 3602110^2 + 2543948^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19446867878807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2430858484847 + ... + 2430858484854.

It is an arithmetic number, because the mean of its divisors is an integer number (5672003131319).

Almost surely, 2^{19446867878804} is an apocalyptic number.

It is an amenable number.

19446867878804 is a deficient number, since it is larger than the sum of its proper divisors (14585150909110).

19446867878804 is a wasteful number, since it uses less digits than its factorization.

19446867878804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4861716969705 (or 4861716969703 counting only the distinct ones).

The product of its (nonzero) digits is 4161798144, while the sum is 80.

The spelling of 19446867878804 in words is "nineteen trillion, four hundred forty-six billion, eight hundred sixty-seven million, eight hundred seventy-eight thousand, eight hundred four".