19899729160 has 16 divisors (see below), whose sum is σ = 44774390700. Its totient is φ = 7959891648.

The previous prime is 19899729149. The next prime is 19899729197. The reversal of 19899729160 is 6192799891.

It can be written as a sum of positive squares in 2 ways, for example, as 19817319076 + 82410084 = 140774^2 + 9078^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248746575 + ... + 248746654.

Almost surely, 2^19899729160 is an apocalyptic number.

19899729160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19899729160 is an abundant number, since it is smaller than the sum of its proper divisors (24874661540).

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

19899729160 is a wasteful number, since it uses less digits than its factorization.

19899729160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497493240 (or 497493236 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 61.

The spelling of 19899729160 in words is "nineteen billion, eight hundred ninety-nine million, seven hundred twenty-nine thousand, one hundred sixty".