19688299225 has 81 divisors (see below), whose sum is σ = 30115463391. Its totient is φ = 12729376800.

The previous prime is 19688299171. The next prime is 19688299249. The reversal of 19688299225 is 52299288691.

The square root of 19688299225 is 140315.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7087787721 + 12600511504 = 84189^2 + 112252^2 .

It is not a de Polignac number, because 19688299225 - 2⁹ = 19688298713 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 93309370 + ... + 93309580.

Almost surely, 2^19688299225 is an apocalyptic number.

19688299225 is the 140315-th square number.

19688299225 is the 70158-th centered octagonal number.

It is an amenable number.

19688299225 is a deficient number, since it is larger than the sum of its proper divisors (10427164166).

19688299225 is an equidigital number, since it uses as much as digits as its factorization.

19688299225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 242 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 61.

The spelling of 19688299225 in words is "nineteen billion, six hundred eighty-eight million, two hundred ninety-nine thousand, two hundred twenty-five".