19194717025 has 45 divisors (see below), whose sum is σ = 26296260105. Its totient is φ = 13898834400.

The previous prime is 19194717013. The next prime is 19194717029. The reversal of 19194717025 is 52071749191.

The square root of 19194717025 is 138545.

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

It can be written as a sum of positive squares in 4 ways, for example, as 2619699489 + 16575017536 = 51183^2 + 128744^2 .

It is not a de Polignac number, because 19194717025 - 2⁵ = 19194716993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19194717029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 83819611 + ... + 83819839.

Almost surely, 2^19194717025 is an apocalyptic number.

19194717025 is the 138545-th square number.

19194717025 is the 69273-rd centered octagonal number.

It is an amenable number.

19194717025 is a deficient number, since it is larger than the sum of its proper divisors (7101543080).

19194717025 is an frugal number, since it uses more digits than its factorization.

19194717025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 46.

The spelling of 19194717025 in words is "nineteen billion, one hundred ninety-four million, seven hundred seventeen thousand, twenty-five".