18869197484544 has 960 divisors, whose sum is σ = 59123569849344. Its totient is φ = 5334810624000.

The previous prime is 18869197484537. The next prime is 18869197484617. The reversal of 18869197484544 is 44548479196881.

It is a super-2 number, since 2×18869197484544² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18869197484544.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18627045382 + ... + 18627046394.

Almost surely, 2^{18869197484544} 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 18869197484544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29561784924672).

18869197484544 is an abundant number, since it is smaller than the sum of its proper divisors (40254372364800).

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

18869197484544 is a wasteful number, since it uses less digits than its factorization.

18869197484544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201 (or 1174 counting only the distinct ones).

The product of its digits is 2229534720, while the sum is 78.

The spelling of 18869197484544 in words is "eighteen trillion, eight hundred sixty-nine billion, one hundred ninety-seven million, four hundred eighty-four thousand, five hundred forty-four".