19281310812 has 36 divisors (see below), whose sum is σ = 48774647376. Its totient is φ = 6422385600.

The previous prime is 19281310753. The next prime is 19281310859. The reversal of 19281310812 is 21801318291.

It is a happy number.

19281310812 is a `hidden beast` number, since 192 + 81 + 310 + 81 + 2 = 666.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146689 + ... + 245112.

It is an arithmetic number, because the mean of its divisors is an integer number (1354851316).

Almost surely, 2^19281310812 is an apocalyptic number.

19281310812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19281310812 is an abundant number, since it is smaller than the sum of its proper divisors (29493336564).

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

19281310812 is a wasteful number, since it uses less digits than its factorization.

19281310812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393178 (or 393173 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The spelling of 19281310812 in words is "nineteen billion, two hundred eighty-one million, three hundred ten thousand, eight hundred twelve".