19664527353 has 8 divisors (see below), whose sum is σ = 26777228928. Its totient is φ = 12830755344.

The previous prime is 19664527349. The next prime is 19664527367. The reversal of 19664527353 is 35372546691.

It is a happy number.

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

It is not a de Polignac number, because 19664527353 - 2² = 19664527349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19664527296 and 19664527305.

It is not an unprimeable number, because it can be changed into a prime (19664527313) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 69732226 + ... + 69732507.

It is an arithmetic number, because the mean of its divisors is an integer number (3347153616).

Almost surely, 2^19664527353 is an apocalyptic number.

It is an amenable number.

19664527353 is a deficient number, since it is larger than the sum of its proper divisors (7112701575).

19664527353 is a wasteful number, since it uses less digits than its factorization.

19664527353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139464783.

The product of its digits is 4082400, while the sum is 51.

The spelling of 19664527353 in words is "nineteen billion, six hundred sixty-four million, five hundred twenty-seven thousand, three hundred fifty-three".