19871191032 has 192 divisors, whose sum is σ = 63024134400. Its totient is φ = 5072225280.

The previous prime is 19871191031. The next prime is 19871191037. The reversal of 19871191032 is 23019117891.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19871191031) 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 47 ways as a sum of consecutive naturals, for example, 6431344 + ... + 6434432.

It is an arithmetic number, because the mean of its divisors is an integer number (328250700).

Almost surely, 2^19871191032 is an apocalyptic number.

19871191032 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 19871191032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31512067200).

19871191032 is an abundant number, since it is smaller than the sum of its proper divisors (43152943368).

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

19871191032 is a wasteful number, since it uses less digits than its factorization.

19871191032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234 (or 3171 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 42.

The spelling of 19871191032 in words is "nineteen billion, eight hundred seventy-one million, one hundred ninety-one thousand, thirty-two".