19441689128 has 16 divisors (see below), whose sum is σ = 36499498080. Its totient is φ = 9708489648.

The previous prime is 19441689121. The next prime is 19441689133. The reversal of 19441689128 is 82198614491.

It is a happy number.

It is a super-2 number, since 2×19441689128² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19441689128.

It is not an unprimeable number, because it can be changed into a prime (19441689121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1537676 + ... + 1550267.

It is an arithmetic number, because the mean of its divisors is an integer number (2281218630).

Almost surely, 2^19441689128 is an apocalyptic number.

It is an amenable number.

19441689128 is a deficient number, since it is larger than the sum of its proper divisors (17057808952).

19441689128 is a wasteful number, since it uses less digits than its factorization.

19441689128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3088736 (or 3088732 counting only the distinct ones).

The product of its digits is 995328, while the sum is 53.

The spelling of 19441689128 in words is "nineteen billion, four hundred forty-one million, six hundred eighty-nine thousand, one hundred twenty-eight".