19497933225 has 135 divisors (see below), whose sum is σ = 37758117397. Its totient is φ = 9946480320.

The previous prime is 19497933163. The next prime is 19497933229. The reversal of 19497933225 is 52233979491.

The square root of 19497933225 is 139635.

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

19497933225 is a `hidden beast` number, since 19 + 497 + 93 + 32 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 268009641 + 19229923584 = 16371^2 + 138672^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is not a de Polignac number, because 19497933225 - 2¹⁹ = 19497408937 is a prime.

It is a Duffinian number.

Its product of digits (3674160) is a multiple of the sum of its prime divisors (144).

It is not an unprimeable number, because it can be changed into a prime (19497933229) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 182223622 + ... + 182223728.

Almost surely, 2^19497933225 is an apocalyptic number.

19497933225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19497933225 is the 139635-th square number.

19497933225 is the 69818-th centered octagonal number.

It is an amenable number.

19497933225 is a deficient number, since it is larger than the sum of its proper divisors (18260184172).

19497933225 is an equidigital number, since it uses as much as digits as its factorization.

19497933225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 144 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The spelling of 19497933225 in words is "nineteen billion, four hundred ninety-seven million, nine hundred thirty-three thousand, two hundred twenty-five".