18889493459886 has 192 divisors, whose sum is σ = 48980250009600. Its totient is φ = 5147563944960.

The previous prime is 18889493459857. The next prime is 18889493459951. The reversal of 18889493459886 is 68895439498881.

18889493459886 is a `hidden beast` number, since 1 + 8 + 8 + 8 + 9 + 4 + 9 + 3 + 4 + 598 + 8 + 6 = 666.

It is a super-2 number, since 2×18889493459886² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18889493459796 and 18889493459805.

It is a congruent number.

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, 398884386 + ... + 398931738.

It is an arithmetic number, because the mean of its divisors is an integer number (255105468800).

Almost surely, 2^{18889493459886} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18889493459886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24490125004800).

18889493459886 is an abundant number, since it is smaller than the sum of its proper divisors (30090756549714).

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

18889493459886 is a wasteful number, since it uses less digits than its factorization.

18889493459886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48871 (or 48868 counting only the distinct ones).

The product of its digits is 34398535680, while the sum is 90.

The spelling of 18889493459886 in words is "eighteen trillion, eight hundred eighty-nine billion, four hundred ninety-three million, four hundred fifty-nine thousand, eight hundred eighty-six".