19613381512 has 16 divisors (see below), whose sum is σ = 36781465500. Its totient is φ = 9804990720.

The previous prime is 19613381477. The next prime is 19613381533. The reversal of 19613381512 is 21518331691.

It can be written as a sum of positive squares in 2 ways, for example, as 18650272356 + 963109156 = 136566^2 + 31034^2 .

It is a super-2 number, since 2×19613381512² (a number of 21 digits) contains 22 as substring.

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, 162789 + ... + 256372.

Almost surely, 2^19613381512 is an apocalyptic number.

It is an amenable number.

19613381512 is a deficient number, since it is larger than the sum of its proper divisors (17168083988).

19613381512 is a wasteful number, since it uses less digits than its factorization.

19613381512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425016 (or 425012 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The spelling of 19613381512 in words is "nineteen billion, six hundred thirteen million, three hundred eighty-one thousand, five hundred twelve".