19878590112 has 48 divisors (see below), whose sum is σ = 52669001952. Its totient is φ = 6564266240.

The previous prime is 19878590111. The next prime is 19878590177. The reversal of 19878590112 is 21109587891.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (19878590111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957339 + ... + 977882.

It is an arithmetic number, because the mean of its divisors is an integer number (1097270874).

Almost surely, 2^19878590112 is an apocalyptic number.

19878590112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19878590112 is an abundant number, since it is smaller than the sum of its proper divisors (32790411840).

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

19878590112 is a wasteful number, since it uses less digits than its factorization.

19878590112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935341 (or 1935333 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 51.

The spelling of 19878590112 in words is "nineteen billion, eight hundred seventy-eight million, five hundred ninety thousand, one hundred twelve".