19871124135 has 36 divisors (see below), whose sum is σ = 33789817464. Its totient is φ = 9969866240.

The previous prime is 19871124079. The next prime is 19871124149. The reversal of 19871124135 is 53142117891.

It is not a de Polignac number, because 19871124135 - 2¹² = 19871120039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9280165 + ... + 9282305.

Almost surely, 2^19871124135 is an apocalyptic number.

19871124135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19871124135 is a deficient number, since it is larger than the sum of its proper divisors (13918693329).

19871124135 is an frugal number, since it uses more digits than its factorization.

19871124135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4324 (or 2166 counting only the distinct ones).

The product of its digits is 60480, while the sum is 42.

The spelling of 19871124135 in words is "nineteen billion, eight hundred seventy-one million, one hundred twenty-four thousand, one hundred thirty-five".