19444908025 has 15 divisors (see below), whose sum is σ = 24256937071. Its totient is φ = 15462777160.

The previous prime is 19444907987. The next prime is 19444908029. The reversal of 19444908025 is 52080944491.

The square root of 19444908025 is 139445.

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., 7000166889 + 12444741136 = 83667^2 + 111556^2 .

It is not a de Polignac number, because 19444908025 - 2¹³ = 19444899833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19444908029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 116436492 + ... + 116436658.

Almost surely, 2^19444908025 is an apocalyptic number.

19444908025 is the 139445-th square number.

19444908025 is the 69723-rd centered octagonal number.

It is an amenable number.

19444908025 is a deficient number, since it is larger than the sum of its proper divisors (4812029046).

19444908025 is an frugal number, since it uses more digits than its factorization.

19444908025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 19444908025 in words is "nineteen billion, four hundred forty-four million, nine hundred eight thousand, twenty-five".