19738845025 has 9 divisors (see below), whose sum is σ = 24477038931. Its totient is φ = 15790514040.

The previous prime is 19738845013. The next prime is 19738845037. The reversal of 19738845025 is 52054883791.

It is a happy number.

The square root of 19738845025 is 140495.

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

It is an interprime number because it is at equal distance from previous prime (19738845013) and next prime (19738845037).

It can be written as a sum of positive squares in only one way, i.e., 7105984209 + 12632860816 = 84297^2 + 112396^2 .

It is not a de Polignac number, because 19738845025 - 2⁷ = 19738844897 is a prime.

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 688426 + ... + 716524.

Almost surely, 2^19738845025 is an apocalyptic number.

19738845025 is the 140495-th square number.

19738845025 is the 70248-th centered octagonal number.

It is an amenable number.

19738845025 is a deficient number, since it is larger than the sum of its proper divisors (4738193906).

19738845025 is an frugal number, since it uses more digits than its factorization.

19738845025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56208 (or 28104 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 19738845025 in words is "nineteen billion, seven hundred thirty-eight million, eight hundred forty-five thousand, twenty-five".