18495458047872 has 256 divisors, whose sum is σ = 59249214259200. Its totient is φ = 5646098110464.

The previous prime is 18495458047831. The next prime is 18495458047879. The reversal of 18495458047872 is 27874085459481.

18495458047872 is a `hidden beast` number, since 1 + 8 + 4 + 9 + 5 + 4 + 5 + 80 + 478 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 18495458047872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18495458047879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4085113 + ... + 7326599.

It is an arithmetic number, because the mean of its divisors is an integer number (231442243200).

Almost surely, 2^{18495458047872} is an apocalyptic number.

18495458047872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18495458047872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29624607129600).

18495458047872 is an abundant number, since it is smaller than the sum of its proper divisors (40753756211328).

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

18495458047872 is a wasteful number, since it uses less digits than its factorization.

18495458047872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3241650 (or 3241632 counting only the distinct ones).

The product of its (nonzero) digits is 722534400, while the sum is 72.

The spelling of 18495458047872 in words is "eighteen trillion, four hundred ninety-five billion, four hundred fifty-eight million, forty-seven thousand, eight hundred seventy-two".