19513728131 has 8 divisors (see below), whose sum is σ = 20188080000. Its totient is φ = 18842181120.

The previous prime is 19513728119. The next prime is 19513728151. The reversal of 19513728131 is 13182731591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19513728131 is a prime.

It is a super-2 number, since 2×19513728131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19513728151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687056 + ... + 714893.

It is an arithmetic number, because the mean of its divisors is an integer number (2523510000).

Almost surely, 2^19513728131 is an apocalyptic number.

19513728131 is a deficient number, since it is larger than the sum of its proper divisors (674351869).

19513728131 is a wasteful number, since it uses less digits than its factorization.

19513728131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402429.

The product of its digits is 45360, while the sum is 41.

The spelling of 19513728131 in words is "nineteen billion, five hundred thirteen million, seven hundred twenty-eight thousand, one hundred thirty-one".