19435605988 has 12 divisors (see below), whose sum is σ = 34153442092. Its totient is φ = 9677479680.

The previous prime is 19435605977. The next prime is 19435606007. The reversal of 19435605988 is 88950653491.

It can be written as a sum of positive squares in 2 ways, for example, as 15266579364 + 4169026624 = 123558^2 + 64568^2 .

It is a super-2 number, since 2×19435605988² (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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10079745 + ... + 10081672.

Almost surely, 2^19435605988 is an apocalyptic number.

It is an amenable number.

19435605988 is a deficient number, since it is larger than the sum of its proper divisors (14717836104).

19435605988 is a wasteful number, since it uses less digits than its factorization.

19435605988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20161662 (or 20161660 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 58.

The spelling of 19435605988 in words is "nineteen billion, four hundred thirty-five million, six hundred five thousand, nine hundred eighty-eight".