19431678140 has 72 divisors (see below), whose sum is σ = 47494106352. Its totient is φ = 6658740480.

The previous prime is 19431678139. The next prime is 19431678169. The reversal of 19431678140 is 4187613491.

It is a junction number, because it is equal to n+sod(n) for n = 19431678091 and 19431678100.

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 23 ways as a sum of consecutive naturals, for example, 2388119 + ... + 2396241.

It is an arithmetic number, because the mean of its divisors is an integer number (659640366).

Almost surely, 2^19431678140 is an apocalyptic number.

19431678140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19431678140 is an abundant number, since it is smaller than the sum of its proper divisors (28062428212).

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

19431678140 is a wasteful number, since it uses less digits than its factorization.

19431678140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10587 (or 10578 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 19431678140 in words is "nineteen billion, four hundred thirty-one million, six hundred seventy-eight thousand, one hundred forty".