19877185008 has 120 divisors (see below), whose sum is σ = 58616414480. Its totient is φ = 6270566400.

The previous prime is 19877184997. The next prime is 19877185021. The reversal of 19877185008 is 80058177891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3151458 + ... + 3157758.

Almost surely, 2^19877185008 is an apocalyptic number.

19877185008 is a gapful number since it is divisible by the number (18) 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 19877185008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29308207240).

19877185008 is an abundant number, since it is smaller than the sum of its proper divisors (38739229472).

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

19877185008 is a wasteful number, since it uses less digits than its factorization.

19877185008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7487 (or 7478 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 54.

The spelling of 19877185008 in words is "nineteen billion, eight hundred seventy-seven million, one hundred eighty-five thousand, eight".