19875640312 has 32 divisors (see below), whose sum is σ = 40660242480. Its totient is φ = 9033154560.

The previous prime is 19875640247. The next prime is 19875640313. The reversal of 19875640312 is 21304657891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19875640313) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1069048 + ... + 1087480.

It is a 2-persistent number, because it is pandigital, and so is 2⋅19875640312 = 39751280624, but 3⋅19875640312 = 59626920936 is not.

Almost surely, 2^19875640312 is an apocalyptic number.

It is an amenable number.

19875640312 is an abundant number, since it is smaller than the sum of its proper divisors (20784602168).

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

19875640312 is a wasteful number, since it uses less digits than its factorization.

19875640312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30703 (or 30699 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 19875640312 in words is "nineteen billion, eight hundred seventy-five million, six hundred forty thousand, three hundred twelve".