19549548468 has 18 divisors (see below), whose sum is σ = 49416914274. Its totient is φ = 6516516144.

The previous prime is 19549548451. The next prime is 19549548503. The reversal of 19549548468 is 86484594591.

19549548468 is a `hidden beast` number, since 1 + 9 + 5 + 4 + 95 + 484 + 68 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17324350884 + 2225197584 = 131622^2 + 47172^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×19549548468² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 271521471 + ... + 271521542.

Almost surely, 2^19549548468 is an apocalyptic number.

19549548468 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19549548468 is an abundant number, since it is smaller than the sum of its proper divisors (29867365806).

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

19549548468 is a wasteful number, since it uses less digits than its factorization.

19549548468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543043023 (or 543043018 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 63.

The spelling of 19549548468 in words is "nineteen billion, five hundred forty-nine million, five hundred forty-eight thousand, four hundred sixty-eight".