19425218834025 has 27 divisors (see below), whose sum is σ = 34792843702071. Its totient is φ = 10360081452240.

The previous prime is 19425218833957. The next prime is 19425218834041. The reversal of 19425218834025 is 52043881252491.

The square root of 19425218834025 is 4407405.

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

19425218834025 is a `hidden beast` number, since 1 + 9 + 4 + 2 + 52 + 188 + 3 + 402 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6993078780249 + 12432140053776 = 2644443^2 + 3525924^2 .

It is a de Polignac number, because none of the positive numbers 2^k-19425218834025 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 65964162 + ... + 66257988.

Almost surely, 2^{19425218834025} is an apocalyptic number.

19425218834025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19425218834025 is the 4407405-th square number.

19425218834025 is the 2203703-rd centered octagonal number.

It is an amenable number.

19425218834025 is a deficient number, since it is larger than the sum of its proper divisors (15367624868046).

19425218834025 is an frugal number, since it uses more digits than its factorization.

19425218834025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587670 (or 293835 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 19425218834025 in words is "nineteen trillion, four hundred twenty-five billion, two hundred eighteen million, eight hundred thirty-four thousand, twenty-five".