19838299509 has 24 divisors (see below), whose sum is σ = 33634049280. Its totient is φ = 11029786848.

The previous prime is 19838299501. The next prime is 19838299543. The reversal of 19838299509 is 90599283891.

19838299509 is a `hidden beast` number, since 1 + 9 + 8 + 38 + 2 + 99 + 509 = 666.

It is not a de Polignac number, because 19838299509 - 2³ = 19838299501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19838299501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4252989 + ... + 4257650.

It is an arithmetic number, because the mean of its divisors is an integer number (1401418720).

Almost surely, 2^19838299509 is an apocalyptic number.

It is an amenable number.

19838299509 is a deficient number, since it is larger than the sum of its proper divisors (13795749771).

19838299509 is a wasteful number, since it uses less digits than its factorization.

19838299509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8510689 (or 8510686 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 63.

The spelling of 19838299509 in words is "nineteen billion, eight hundred thirty-eight million, two hundred ninety-nine thousand, five hundred nine".