19886935240 has 64 divisors (see below), whose sum is σ = 48906063360. Its totient is φ = 7245327360.

The previous prime is 19886935199. The next prime is 19886935273. The reversal of 19886935240 is 4253968891.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 450622 + ... + 492781.

It is an arithmetic number, because the mean of its divisors is an integer number (764157240).

Almost surely, 2^19886935240 is an apocalyptic number.

19886935240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19886935240 is an abundant number, since it is smaller than the sum of its proper divisors (29019128120).

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

19886935240 is a wasteful number, since it uses less digits than its factorization.

19886935240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943462 (or 943458 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 19886935240 in words is "nineteen billion, eight hundred eighty-six million, nine hundred thirty-five thousand, two hundred forty".