19829645608 has 8 divisors (see below), whose sum is σ = 37180585530. Its totient is φ = 9914822800.

The previous prime is 19829645603. The next prime is 19829645629. The reversal of 19829645608 is 80654692891.

It can be written as a sum of positive squares in only one way, i.e., 13032962244 + 6796683364 = 114162^2 + 82442^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (19829645603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239352843 + ... + 1239352858.

Almost surely, 2^19829645608 is an apocalyptic number.

It is an amenable number.

19829645608 is a deficient number, since it is larger than the sum of its proper divisors (17350939922).

19829645608 is a wasteful number, since it uses less digits than its factorization.

19829645608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478705707 (or 2478705703 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 58.

The spelling of 19829645608 in words is "nineteen billion, eight hundred twenty-nine million, six hundred forty-five thousand, six hundred eight".