19874387268 has 36 divisors (see below), whose sum is σ = 53193214620. Its totient is φ = 6235101696.

The previous prime is 19874387257. The next prime is 19874387293. The reversal of 19874387268 is 86278347891.

19874387268 is a `hidden beast` number, since 198 + 7 + 4 + 387 + 2 + 68 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18213661764 + 1660725504 = 134958^2 + 40752^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16236633 + ... + 16237856.

It is an arithmetic number, because the mean of its divisors is an integer number (1477589295).

Almost surely, 2^19874387268 is an apocalyptic number.

19874387268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19874387268 is an abundant number, since it is smaller than the sum of its proper divisors (33318827352).

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

19874387268 is a wasteful number, since it uses less digits than its factorization.

19874387268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32474516 (or 32474511 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The spelling of 19874387268 in words is "nineteen billion, eight hundred seventy-four million, three hundred eighty-seven thousand, two hundred sixty-eight".